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प्रश्न
A beam of monochromatic light is incident at an angle of incidence of 50° on one face of an equilateral prism. If the angle of emergence is 40°, what will be the angle of minimum deviation?
संख्यात्मक
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उत्तर
Given:
Angle of incidence (i) = 50°
Angle of emergence (e) = 40°
Angle of an equilateral prism (A) = 60° (Since an equilateral triangle has angles of 60°)
Formula:
A + δ = i + e
δ = i + e − A
= 50° + 40° − 60°
= 90° − 60°
= 30°
The angle of deviation is 30°.
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