Question

19(iv) If the angle of incidence, angle of emergence and angle of deviation for a given
ray of light in case a prism are 50°,30° and 60° respectively, then the angle of prism is:
(a) 50°
(b) 20°
(c) 40°
(d) 60°

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Answer 1

Answer:

B) 20 degrees

Explanation:

Angle of incidence + angle of emergence = angle of prism + angle of deviation

∴ 50 + 30 = 60 + A

A=20

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Answer 2

20 degree plz mark me as brainlist