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ICSE Class 10 Physics Question 9 of 20

Solved 2019 Question Paper ICSE Class 10 Physics — Question 4

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Question

Question 6(a)

How does the angle of deviation formed by a prism change with the increase in the angle of incidence? Draw a graph showing the variation in the angle of deviation with the angle of incidence at a prism surface. [3]

Answer

The angle of deviation (δ) produced by a prism first decreases with the increase in angle of incidence (i) and reaches to a minimum value at a certain angle of incidence. With further increase in angle of incidence, angle of deviation also increases.

The graph below shows the variation of angle of deviation with the angle of incidence:

How does the angle of deviation formed by a prism change with the increase in the angle of incidence? Draw a graph showing the variation in the angle of deviation with the angle of incidence at a prism surface. ICSE 2019 Physics Solved Question Paper.