Maharashtra State BoardHSC Science (General) 11th
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Answer the following question in detail. Explain the formation of a secondary rainbow. For which angular range with the horizontal is it visible? - Physics

Answer in Brief

Answer the following question in detail.

Explain the formation of a secondary rainbow. For which angular range with the horizontal is it visible?

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Solution

  1. A ray AB incident from Sun (white light) strikes the lower portion of a water drop at an incident angle i.
  2. On entering into the water, it deviates and disperses into constituent colours. The figure shows the extreme colours (violet and red).

           Formation of secondary rainbow
  3. Refracted rays BV and BR finally emerge the drop from V' and R' after suffering two internal reflections and can be seen by an observer on the ground.
  4. Minimum deviation rays of red and violet colour are inclined to the ground level at θR ≈ 51° and θV ≈ 53° respectively. As a result, in the rainbow, the violet is above and red is below.
  Is there an error in this question or solution?
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APPEARS IN

Balbharati Physics 11th Standard Maharashtra State Board
Chapter 9 Optics
Exercises | Q 3. (iv) (iii) | Page 186
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