TEST - 17 (Human eye and Colourful world)

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EFFORTS NEVER FAIL

NAME : *

1. Rainbow is formed due to *

1 point

Reflection of sunlight from air

Dispersion of light

Refraction of light

Scattering of light

2. The size of an object is perceived by an eye depends primarily on? *

1 point

Actual size of object

Distance of the object from the eye

Aperture of pupil

Size of image formed on retina

3. The adjacent figure shows which eye defect ? And how it will correct ? *

1 point

Hypermetropia, bi-concave lens

Myopia, bi-convex lens

Hypermetropia, bi-convex lens

Myopia, bi-concave lens

4. When objects at different distances are seen by eye, which of the following remain constant? *

1 point

Focal length of lens

Object distance from eye lens

The radii of curvature

Image distance of eye lens

5. During refraction, will not change? *

1 point

Wave length

Frequency

Speed of light

All the above

6.The wave lengths corresponding to violet, yellow, red lights are *

1 point

λv>λy > λr

λv< λy<λr

λy< λv<λr

λy < λr<λv

7.The process of remission of absorbed light in all directions with different intensities by anatom or molecule is called? *

1 point

Scattering of light

Dispersion of light

Reflection of light

Refraction of light

8. The muscle iris control the *

1 point

Optic nerve

Opening of pupil

Focal length of eye lens

Shape of crystalline lens

9. The number of surfaces bounding a prism is *

1 point

10. When the focal length of lens is 50Cm, then power of lenses is *

1 point

I D

2 D

0.25 D

0.5 D

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