Question

1.For a given prism the angle of incidence is changed from 0° and 90°, the angle of deviation [ 1
a) increases
b) decreases
c) first decreases and then increases
d) first increases and then decreases
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Answer 1

Answer:

a is the correct answer pls mark me as bainiliest

Explanation:

Enjoy!!1

Answer 2

When the angle of incidence is changed from 0°C to 90°C the angle of deviation first decreases and then increases. (option c)

• It has been experimentally observed by plotting the δ-i graph that when the angle of incidence increases the angle of deviation also increases till a certain point.
• When it reaches the condition of the minimum deviation angle, then the angle of deviation starts to increase with the increase in the angle of incidence.
• When the angle of deviation is minimum, the angle of incidence is equal to the angle of emergence (i = e).