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Q 1. A person cannot read a distant road sign board clearly but can easily read the speedometer on the dashboard of his car. Which of the following is correct in his case? 
The near point of his eyes has receded away.
The near point of his eyes has come closer to him.
The far point of his eyes has come closer to him.
The near point of his eyes has receded away.
Q 2. If the Earth had no atmosphere, then the sky would have appeared
blue
red
bright
dark
Q 3. The sun near horizon appears
White
Yellow
Red
Golden
Q 4. When light is thrown out in random directions, it is called
reflection of light
refraction of light
scattering of light
diffraction of light
Q 5. Isha's eyeballs are too short due to which she cannot see
Distant objects
Cannot see at all
Nearby objects
Parallel vertical lines
Q 6. A person suffering from myopia can see up to 3m.The power of lens required to rectify is
-4.00 D
-0.33 D
-3.33 D
-1.75 D
Q 7. On a clear day, the sky appears to be more blue towards the zenith (overhead) than it does toward the horizon. This occurs because:
the atmosphere is denser higher up than it is at the earth's surface.
the temperature of the upper atmosphere is higher than it is at the earth's surface.
the sunlight travels over a longer path at the horizon, resulting in more absorption.
none of the above is true.
Q 8. During dispersion of white light by prism placed in air,
only angular spread takes place
only angular deviation takes place
both angular deviation and angular spread take place
either angular spread or angular deviation for the mean colour takes place depending on the angle of the prism
Q 9. Stars appear to be higher in the sky than actually they are because of
atmospheric reflection
atmospheric refraction
scattering of light
dispersion of light
Q 10. A defective eye cannot see close objects clearly. This is because their images are formed
On the retina
On the eye lens
Behind retina
Beyond retina
Q 11. The colour of scattered light depends on
size of scattering particles
reflected light
reflected colour of light
intensity of light
Q 12. At sunrise or sunset, the sun looks reddish, because:
the sun is coldest at those times.
of the effects of reflection and refraction.
the sun is hottest at those times.
of the scattering of light.
Q 13. The focal length of the eye lens increases when eye muscles
are relaxed and lens becomes thinner
contract and lens becomes thicker
are relaxed and lens becomes thicker
contract and lens becomes thinner
Q 14. The human eye works on the principle of
reflection of light
refraction of light
scattering of light
diffraction of light
Q 15. A person suffering from myopia cannot see clearly beyond 1 m. What should be the focal length of the concave lens that will correct his vision?
0.5 m
1 m
2 m
4 m
Q 16. The amount of light entering the eye is controlled by
Cornea
Iris
Lens
Ciliary muscles
Q 17. A white light is a mixture of
Eight colours
Three primary colours
Seven colours
Nine colours
Q 18. A flat, coloured and ring-shaped membrane behind the cornea is
Ciliary muscles
Suspensory ligaments
Pupil
Iris
Q 19. How are the colours of a spectrum arranged?
In order of increasing frequency
In order of decreasing frequency
In the order of increasing wavelength
In random order
Q 20. The cold air layers of the atmosphere behave as optically
Denser medium
Rarer medium
Inactive medium
None of the above
Q 21. The combination responsible for admitting different amounts of light into eye is
Ciliary muscles and crystalline lens
Iris and pupil
Ciliary muscles and pupil
Rods and cones
Q 22. Which of the following are sensitive to bright light?
Cones
Rods
Cornea
None of the above
Q 23. Why does the Sun appear circular at noon?
The rays of light from upper edges of sun have to pass maximum thickness.
The rays of the Sun have to pass through minimum thickness of air.
The rays of light from the lower edges of Sun are refracted more.
 None of the above.
Q 24. Which light is easily scattered?
Long wavelength light
Short wavelength light
Sunlight
Coherent light
Q 25. One cannot see through fog because :
fog absorbs light.
the refractive index of fog is infinity.
 light suffers total internal reflection at the droplets of fog.
light is scattered by the droplets of fog.
Q 26. Identify the correct statement: Iris controls the size of the pupil.  Pupil controls the size of the iris.  The eye lens forms an inverted real image of the object. Pupil controls the amount of light entering the eye. 
(1), (3) and (4)
(1) and (4)
(3) and (4)
(2), (3) and (4)
Q 27. Which of the following is used to correct the eye defect - presbyopia?
Convex lens
Concave lens
Prismatic lens
Bi-focal lenses
Q 28. A person has near point of his vision shifted to 50 cm. What lens must be used to see an object placed at 25 cm from the eye? What is the power of the lens?
A converging lens of focal lens 50 cm and power - 2 D
A converging lens of focal length 50 cm and power + 2 D
A diverging lens of focal length 50 cm and power - 2 D
A diverging lens of focal length 50 cm and power + 2 D
Q 29. Which phenomenon does not play a role in the formation of a rainbow?
Reflection  
Refraction   
Dispersion    
Absorption 
Q 30. Which of the following statements is/are true in dispersion? I: Refractive index for violet colour is maximum II: Deviation produced for red colour is minimum III: The wavelength for green colour is greater than that for blue colour
I and II only
II and III only
I and III only
All the statements
Q 31. An optician used concave lens to correct the defect of eye so that the customer can see clearly. Which defect of vision could it be?
Far sightedness
Near sightedness
Cataract
Conjunctivitis
Q 32. The change in the focal length of an eye lens is caused by the action of
Ciliary muscles
Pupil
Aqueous humour
Optic nerve
Q 33. When looking at a distant object, the ciliary muscles of the eye are
relaxed
contracted
strained
Both b and c
Q 34. A boy is wearing glasses and says that he cannot see the object kept at a distance without glasses. He is suffering from
Myopia
Cataract
Hypermetropia
Presbyopia
Q 35. The fluid between the retina and the lens is known as ________ .
aqueous humour
vitreous humour
aqua
humus
Q 36. By how much time is the sunset delayed due to atmospheric refraction?
2 hours
5 minutes
20 minutes
2 minutes
Q 37. Why does Sun appear slightly oval shaped at morning and evening?
The rays of light from upper edge of the sun have to pass maximum thickness.
Due to unequal bending of light.
The rays of light from the lower edges of Sun are refracted more.
 All the above.
Q 38. Electric nerve pulses from the retina to brain are conveyed by
ciliary muscles
optic nerves
aqueous humour
pupil
Q 39. The minimum distance at which an object must be placed so that it is clearly visible without strain is called
accommodation
far point
Both a and b
least distance of distinct vision
Q 40. The human eye forms the image of an object at its
Pupil
Iris
Cornea
Retina

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