TEST - 20 (Human eye and Colourful world)

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EFFORTS NEVER FAIL

NAME : *

1. Some time a person may suffer from both myopia and hypermetropia with agening. Then he need to use *

1 point

bi-concave lens

bi-convex lens

bi-focal lens

cooling lens

2. The splilting of white light into seven colours is due to *

1 point

dispersion

scattering

reflection

refraction

3. Blue colour of the sky is due to *

1 point

dispersion

scattering

reflection

refraction

4. Rainbow is formed due to *

1 point

dispersion

scattering

reflection

refraction

5. The value of least distance of distinct vision is about? *

1 point

2.5cm

25cm

100cm

2.277cm

6. The distance between the eye lens and retina is about *

1 point

2.5cm

25cm

2.27cm

2cm

7. Change in the focal length of the eye lens is due to *

1 point

Iris

Cornea

Ciliary Muscles

Cones

8. Myopia can be corrected by using lens *

1 point

Biconvex

Bi Concave

Plano Convex

Plano Concave

9. Hypermetropia can be corrected by using lens. *

1 point

Bi convex

Bi concave

Plano Convex

Plano Concave

10. The splitting of white light into different colors is called *

1 point

Deviation

Dispersion

Scattering

Refraction

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