“Human Eye and Colourful World”
1. The size of an object as perceived by an eye depends primarily on
• Actual size of the object wrong
• Distance of the object from the eye correct
• Aperture of the pupil
• size of the image formed on the retina
2. During refraction ------- will not change.
• Wavelength
• Frequency correct
• Speed of light
• All the above
AP POLYCET 2023 _ “Human Eye and Colourful World” Most Imp Bits
3. When objects at different distances are seen by the eye which of the following remain constant ?
• Focal length of eye-lens correct
• Object distance from eye-lens
• The radii of curvature of eye-lens
• image distance from eye-lens
4. A ray of light falls on one of the lateral surfaces of an equilateral glass prism placed on horizontal surface of the table as shown in the figure. For the minimum deviation of ray which of the following is true ?
• PQ is horizontal
• QR is horizontal correct
• RS is horizontal
• Either PQ or RS is horizontal
5. Far point of a person is 5 m. in order that he has normal vision what kind of spectacles should he use
• Concave lens with focal length 5 m correct
• Concave lens with focal length 10 m
• Convex lens with focal length 5 m
• Convex lens with focal length 2.5 m
6. The process of re-emission of absorbed light in all directions with different intensities by the atom or molecule is called..........
• Scattering of light correct
• Dispersion of light
• Reflection of light
• Refraction of light
7. The human eye forms the image of an object
• Cornea
• Iris
• Pupil
• Retina correct
8. The least distance of distinct vision for a young adult with normal vision is about
• 25 m
• 2.5 cm
• 25 cm correct
• 3 m
9. The human eye can focus objects at different distances by adjusting the focal length of the eye lens. This is due to
• Accommodation correct
• Presbyopia
• Near sightedness
• Farsightedness
AP POLYCET 2023 _ “Human Eye and Colourful World” Most Imp Bits
10. We can see the sun before the actual sunrise by about
• 5 minutes
• 2 minutes correct
• 2 hours
• 20 minutes
11. The light which bends most and least are
• Red and Blue
• Blue and Red
• Violet and Red correct
• Red and Violet
12. Dispersion of light through a prism is
• Same as reflection
• Same as refraction
• Splitting of white light into its constituent colours correct
• None
AP POLYCET 2023 _ “Human Eye and Colourful World” Most Imp Bits
13. At noon the sun appears white as
• Light is least scattered correct
• All the colours of the white light are scattered away
• Blue colour is scattered the most
• Red colour is scattered the most
14. The minimum focal length of eye lens for the person of hypermetropia is greater than
• 2.5 cm
• 2.27 cm correct
• 2.5 m
• 2.27 m
15. A person with ...........can see distances objects usually but cannot see objects at near distances
• Myopia
• Hypermetropia correct
• Presbyopia
• None
16. Why do the danger signals installed at the top of the tall buildings are red in colour ?
• Red light is easily seen from distances
• Red light is scattered the most by smoke or fog
• Red light moves fastest in air
• Red light is easily seen from distances & is scattered the most by smoke or fog correct
AP POLYCET 2023 _ “Human Eye and Colourful World” Most Imp Bits
17. Which of the following is vision defect when the ability of a accommodation of the eye usually decreases with ageing ?
• Presbyopia correct
• Myopia
• Hypermetropia
• All
18. Which of the following lenses are used to correct presbyopia of a person
• Bi-focal correct
• Biconcave
• Biconvex
• Plano-convex
19. When silver bromine exposed to sunlight silver turns to
• Red colour
• Blue colour
• Gray colour correct
• Light green colour
20. Pick out the coloured part that we can see in an eye ?
• Iris correct
• Retina
• Cornea
• Pupil
AP POLYCET 2023 _ “Human Eye and Colourful World” Most Imp Bits
21. The relation between angle of incidence, angle of emergence, angle of deviation and angle of prism is given as
• correct
•
•
•
22. At the angle of minimum deviation (D), the angle of incidence is equal to the angle of .....
• Reflection
• Refraction
• Emergence correct
• Critical
23. The relation between the speed of wave(v), wavelength , and frequency(f) is
•
•
•
• correct
AP POLYCET 2023 _ “Human Eye and Colourful World” Most Imp Bits
24. For myopia people the maximum focal length is less than
• 2.5 cmcorrect
• 2.72 cm
• 2.27 cm
• 2.5 m
25. In which type of defect in vision that people cannot see objects at long distances but can see near by objects clearly ?
• Presbyopia
• Myopiacorrect
• Hypermetropia
• All
26. Due to which molecule the sky appears white on summer days ?
• H2Ocorrect
• O2
• N2
• N2 and O2
27. At which angle of scattering the intensity is maximum ?
• 450
• 900correct
• 300
• 00
28. If you look at which angle , you will observe the colours of VIBGYOR
• Between 400 and 420correct
• More than 420
• 420
• 400
29. Which of the following is formula for the refractive index of prism ?
• correct
•
•
•
30. How many rods and cones are there in the retina of a eye ?
• 2.25 million
• 325 million
• 125 millioncorrect
• 425 million
31. What is the distance between the lens and retina of eye ?
• 25 cm
• 2.27 cm
• 2.5 m
• 2.5 cm correct
AP POLYCET 2023 _ “Human Eye and Colourful World” Most Imp Bits
32. Which of the following is unit of power of lens ?
• Dioptre correct
• Hertz
• Mm
• Cm
33. Which of the following is value of power of lens ?
•
•
•
• and
correct
34. Which of the following receptors in the retina of an eye identify the intensity of life ?
• Cone
• Optic nerve
• Rods correct
• All
35. Which of the following lens are needed to correct one's myopia ?
• Bi convex
• Bi concave correct
• Bi focal
• Plano convex
AP POLYCET 2023 _ “Human Eye and Colourful World” Most Imp Bits
36. A healthy person can see objects at all distances more than ......... healthy clearly.
• 20 cm
• 25 cm correct
• 30 cm
• 35 cm
37. Which of the following is the reason for when the eyes breaks into pieces, the pieces shine brightly ?
• Dispersion
• Refraction
• Total internal reflection
• Scattering of light correct
38. Which of the following molecules are the reason for blue sky ?
• H2O
• H2
• N2, O2correct
• CO2
AP POLYCET 2023 _ “Human Eye and Colourful World” Most Imp Bits
39. Which of the following lens is used to correct the defect of hypermetropia ?
• Plano convex
• Bi focal
• Bi concave
• Bi convex correct
40. The angle of vision for a healthy woman being is about
• 600correct
• 300
• 450
• 900
41. Which of the following reports in the retina identify the colour ?
• Cones correct
• Optic nerve
• Rods
• Iris
42. Effect of dispersion of light among the following is
• Mirage
• Blue colour of the sky
• Rainbow correct
• Twinkling of stars
43. The far point of a myopia eye is 1.5 m. To correct this defect of the eye , the power of lens is
• 0.66 D
• -0.66 D correct
• +1.5 D
• -1.55 D
44. The blue colour of sky is due to
• Reflection
• Refraction
• Dispersion
• Scattering correct
45. The rainbow formed in the sky due to
• Reflection
• Refraction
• Dispersion correct
• Scattering
46. Twinkling of stars is due to
• Refractioncorrect
• Reflection
• Scattering
• Dispersion
47. In hot summer day , you stand outside in the sunshine observing the surroundings. Find the true statement
• Your Iris makes pupil contract correct
• Your Iris makes pupil to expand
• No change in pupil
• No change in iris
48. Which colour light travels faster in vacuum ?
• Blue
• Red
• Yellow
• All will travel with same speed correct
AP POLYCET 2023 _ “Human Eye and Colourful World” Most Imp Bits
49. The angle of minimum deviation for an equilateral triangle prism is form to be 300. Its refractive index is
•
• correct
•
•
50. Light is incident at angle 450 from air (n = 1) on a prism (n =\sqrt{2}). The angle of refraction is
• 300correct
• 450
• 600
• 900
51. The maximum and minimum focal length of the eye lens are
•
•
•
• and correct
52. The shape of the rainbow as seen from an airplane during mid day is
• Semi circle
• Circle correct
• Conical
• Spherical
53. A white colour object ----------all colours
• Absorbs
• Reflects correct
• Transmits
• Scatters
54. The persistence of vision for normal eye is
• of a second
• of a second
• of a second correct
• of a second
55. The power of accommodation for the normal eye is
• 400 D
• 4 D correct
• 40 D
• 44 D
56. The phenomenon of light responsible for the working of the human eye is
• Refraction correct
• Reflection
• Persistence of vision
• Power of accommodation
57. Read colour of the sun at the time of sunrise and sunset is because of
• Red colour is least scattered correct
• Blue colour is least scattered
• All colours are equally scattered
• Red colour is scattered the most
58. Our eye is most sensitive for which of the following wavelengths ?
• 4000 A
• 4500 A
• 5550 A correct
• 6500 A
59. What is the correct relation for A , i , D , e.Where A is angle of prism , i is angle of incidence , D is angle of deviation and e is emergent angle.
• A + D = i + e correct
• A + i = D + e
• A + i + e = D
• A + e = D + i
60. With both eyes open a person's field of view is about
• 180 0correct
• 90 0
• 360 0
• 160 0
61. If retina displaced from its place, then what happens ?
• Sight will blurr
• Blindness occurs correct
• Invert vision occur
• We cannot say
62. An equilateral triangle prism is arranged in minimum deviation position for an angle of incidence of 450 . The angle of minimum deviation is
• 450
• Zero
• 300correct
• 600
AP POLYCET 2023 _ “Human Eye and Colourful World” Most Imp Bits
63. The colours that deviate maximum/minimum in visible spectrum are
• Red / violet
• Green / yellow
• Violet / red correct
• Yellow / green
64. When white light passe through a dispersive medium, it breaks up into various colours, which of the following is true ?
• Velocity of light for violet is less than the velocity of light for red correct
• Velocity of light for violet is greater than the velocity of light for red
• Velocity of light for different colours
• Velocity of light is the same for all colours
65. Cinematography makes use of
• Least distance of distinct vision
• Bifocal lens system
• Accommodation
• Persistence of vision correct
66. A prism ABC (with BC as above) is placed in different orientations. A narrow beam of white light is incident on the prism as shown in the figure. In which of the following cases, after dispersion, the third colour from the top corresponds to the colour of the sky ?
•
• correct
•
•
67. when you are learning about scattering of light whome do you appreciatepp
• Pattabhi RamanH
• Homibaba
• C.V.Raman correct
• Snell
68. Rainbow is due to
• Scattering of light
• Refraction of light
• dispersion
• Total internal reflection of light and dispersion correct
69. Which of the following colours is least scattered by fog dust of smoke
• Yellow
• Violet
• Blue
• Red correct
70. A student of class 10, is not able to see clearly the blackboard questions when seated at adistance of 5m.The defect he is sufferinh from is
• Presbyopia
• Astigmatism
• Myopia correct
• Hypermetropia
71. A Student sitting on the bench can read the letters written on the blackboard but is not able to read the letters written in his textbook .Which of the following statements is correct
• The far point of his eyes has receded away
• The far point of his eyes has come closer to him
• The near point of his eyes has come closer to him
• The near point of his eyes has receded away correct
AP POLYCET 2023 _ “Human Eye and Colourful World” Most Imp Bits
72. The bluish colour of water in deep sea is due to
• Reflection of sky in water
• The presence of algae and other plants found in water
• Absorption of light by the sea
• Scattering of light correct
73. The image properties of retina of eye
• Real
• Virtual & Real correct
• Erect
• Inverted
74. The least distance of distinct vision is
• Its value is 25 cm for healthy eye
• Its value never changes
• The value changes from person to person and with age
• All correct
75. Choose the false statement
• The value of least distance of distinct vision is about 60 cm
• The value of least distance of distinct vision is about 25 cm
• The value of angle of vision of human being is about 600correct
• The value of angle of vision of human being is about 250
76. For any position of object infront of the eye
1. Image distance is fixed and about 25 cm
2. Image distance is fixed and about 2.5 cm
3. The focal length of eye lens changes
4. The focal length of eye lens always changes.
• 1 , 2 , 3
• 2 , 4
• 1 , 2 , 4correct
• 1 , 2 , 3 , 4
77. The brain interprets the signals sent by eye in understanding the object in terms of its size , shape and colour because
• Retina contains about 125 millions of receptors
• Rods identify the colour
• Cones identify the intensity of light
• All correct
AP POLYCET 2023 _ “Human Eye and Colourful World” Most Imp Bits
78. The change in colour of sun at sunrise, sunset and at noon in a day is due to
• Scattering due to dust particles and air molecules causes this phenomenon correct
• The sun is cooler at sunset or at sunrise
• Refraction causes this phenomenon
• Diffraction sends red rays to the earth at this time
79. A camera employs a converging lens to form ........... images.
• Real correct
• Virtual
• Either real or virtual
• None
80. Which diagram shows how a prism can be used to split white light into a spectrum ?
•
•
• correct
•
AP POLYCET 2023 _ “Human Eye and Colourful World” Most Imp Bits
81. The nature of eye sight shown in the following figure
• Myopia correct
• Hypermetropia
• Presbyopia
• No defect at all
82. The eye defect shown in the figure is
• Myopia
• Hypermetropia correct
• Presbyopia
• No defect
83. Other names of myopia are
• Hyperopia and hypermetropia
• Long sightedness and hyperopia
• Near sightedness and presbyopia
• Near sightedness and short sightedness correct
AP POLYCET 2023 _ “Human Eye and Colourful World” Most Imp Bits
84. The sky looks blue on a clear, sunny day because of
• Dispersion of light
• Scattering of light correct
• Reflection of light
• Refraction of light
85. The wavelength corresponding to violet, yellow and red lights are , and respectively
• > >
• < < correct
• < <
• < <
86. Formula for refractive index of prism is
•
•
• correct
•
87. The phenomenon of light scattering in gases and liquids was explained by
• Newton
• C.V raman correct
• Faraday
• Christian huygen
88. The value of least distance of distinct vision is about
• 15 cm
• 20 cm
• 25 cm correct
• 30 cm
89. During refraction of light , the character of light which does not change is
• Wavelength
• Frequency correct
• Speed
• Colour
90. ............reflection does not obey laws of reflection
• Irregular correct
• Regular
• Curved
• Plane
AP POLYCET 2023 _ “Human Eye and Colourful World” Most Imp Bits
91. For a normal eye , the range of vision is from
• 15 cm to infinity
• 20 cm to infinity
• 25 cm to infinity correct
• 30 cm to infinity
92. Power of lens p =
• correct
•
•
•
93. Accommodation of eye lens is maximum at the age group of
• 7 - 8correct
• 10 - 15
• 16 - 40
• 40 - 100
94. The following defect an be corrected by using...........
• Convex
• Concavecorrect
• Bi focal
• Plane
95. In the following figure , parallel rays of light fall on eye and they converge before the retina.it represents a certain defect in the eye. To correct it ,.............lens is used
• Bi - convex
• Bi - concavecorrect
• Plano- concave
• Concavo - convex
96. Doctor tested the eyes of durga and identified that he had hypermetropia . The distance of nearpoint is 50 cm . The power of lens suggested by the doctor to him is
• -2 D
• +2 Dcorrect
• -1 D
• +1 D
AP POLYCET 2023 _ “Human Eye and Colourful World” Most Imp Bits
97. The relation between angle of incidence , angle of emergence , angle of deviation and angle of prism is
•
• correct
•
•
98. The angle of vision of a normal being is about
• 1600
• 160
• 600correct
• 60
99. Blue colour of the sky is due to ...........molecules present in the atmosphere.
• Water vapour and Krypton
• Carbon dioxide and Carbon monoxide
• Nitrogen and Oxygencorrect
• Krypton and Carbon monoxide
100. The receptors present in retina of eye are
• Only cones
• Only rods
• Both cones and rodscorrect
• None
101. The reason behind the blue colour of the sky is
• Reflection of light
• Refraction of light
• Dispersion of light
• Scattering of lightcorrect
AP POLYCET 2023 _ “Human Eye and Colourful World” Most Imp Bits
102.
here f is
• Speed of wave
• Frequencycorrect
• Wavelength
• None
103. The splitting of-------------colour into different colours is called dispersion
• Black
• Red
• Yellow
• Whitecorrect
104. Bi - convex lens is used to correct the
• Hypermetropiacorrect
• Myopia
• Can't be used
• Hypermetropia & Myopia
105. The power of lens is 1D , then focal length is
• 1 cm
• 100 cmcorrect
• 1000 cm
• 1 m
AP POLYCET 2023 _ “Human Eye and Colourful World” Most Imp Bits
106. The distance between the eye lens and retina is about
• 2.5 m
• 2.5 cm correct
• 2.3 m
• 2.8 cm
107. The re-emitted light is called
• Scattered light correct
• Dispersion
• rainbow
• None
108. The phenomenon of scattering of white light by colloidal particle is known as
• Tyndall effect correct
• Dispersion
• Scattered light
• Beam of light
109. The ability of eye - lens to change its focal length and it is called
• Accommodation of lens correct
• Hypermetropia
• Myopia
• None
110. Rods identify the
• Colour
• Intensity of light correct
• Not found in retina
• None
111. In retina cones identify
• Colour correct
• Intensity of light
• Not found in retina
• None
112. Rainbow always form
• Towards the sun
• Opposite direction of the sun correct
• Behind the sun
• None
113. Rods and cones are located in
• Pupil
• Ciliary muscles
• Cornea
• Retina correct
114. The common defects of vision are
• Myopia
• Hypermetropia
• Presbyopia
• All correct
AP POLYCET 2023 _ “Human Eye and Colourful World” Most Imp Bits
115. Pupil is the small hole in
• Retina
• Cornea
• Iris correct
• Pupil
116. Dioptre is the
• SI units of power correct
• CGS unit of power
• SI unit of iris
• CGS unit of iris
117. On which factor does the colour of scattered white light depend ?
• Angle of scattering
• Distance travelled by light
• Size of molecules
• All correct
118. The part between aqueous humour and the lens having muscular diaphragm is known as
• pupil
• Iris correct
• Cornea
• Retina
AP POLYCET 2023 _ “Human Eye and Colourful World” Most Imp Bits
119. Another name for "Near sightedness’s
• Myopia correct
• Hypermetropia
• Presbyopia
• All
120. The purpose of eye is
• To see objects
• To perceive objects
• To see objects & To perceive objects correct
• No purpose
121.
here 'f ' is
• Focal lens
• Focus
• Focal length correct
• All
122. State the colour of sunlight scattered by air molecules in atmosphere.
• Red
• White
• Black
• Blue correct
AP POLYCET 2023 _ “Human Eye and Colourful World” Most Imp Bits
123. What is the unit of Optical power ?
• Newton
• Dioptre correct
• cm
• m
124. Which of the following is usually seen in aged people ?
• Myopia
• Hypermetropia
• Presbyopia correct
• None
125. ...............send the electrical signal from retina to the brain
• Ciliary muscle
• Optic nerve correct
• Rods
• Cones
AP POLYCET 2023 _ “Human Eye and Colourful World” Most Imp Bits
