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Angular width of primary rainbow is...

Angular width of primary rainbow is

A

`2^@`

B

`3^@`

C

`5^@`

D

`6^@`

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TARGET PUBLICATION-OPTICS-EXERCISE
  1. To observe any rainbow the altitude of sun or the angle made by the su...

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  2. The primary rainbow is due to internal reflection inside droplet and ...

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  3. Angular width of primary rainbow is

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  4. The average angle of inclination of the primary rainbow with the axis ...

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  5. In case of secondary rainbow, colour is at the top.

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  6. The secondary rainbow is due to internal reflection inside droplet.

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  7. The straight line joining the sun and the observer along which centre ...

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  8. Pick the correct statement from the following.

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  9. Rays of different colours fail to converge to a point after passing th...

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  10. What causes chromatic aberration?

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  11. Achromatic combination can not be achieved by using

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  12. An achromatic combination of lenss produce.

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  13. In presence of aberration, circular image is formed of a point.

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  14. Spherical aberration of a convex and a concave lens respectively is

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  15. An optical instrument , in general, extends our range of vision by

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  16. The least distance of distinc vision for a young adult with normal vis...

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  17. A norml eye is unable to see objects at a distance less than distance ...

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  18. The clearity of image formed on retina of eye depends on the

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  19. A convex lens of the short focal length held very close to the eye, to...

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  20. The magnifying power of simple microscope is

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