writer of yellow colour is incident on an equilateral glass prism at an angle of incidence is equal to 40 degree and surface of minimum deviation and angle of 36 what will be the angle of emergence angle of incidence 300 30° and 60° state in each with the angle of integration with equal to less than of 36 degree
Answers
Answer:
The refractive index of the material of the prism is where and are the refractive index, angle of the prism and the angle of minimum deviation respectively. The angle of incidence, and the angle of refraction, But is the angle of emergence.
Complete question:
A light ray of yellow color is incident on an equilateral glass prism at an angel of incidence equal to 48° and suffers minimum deviation by an angle of 36°. (i) What will be the angle of emergence? (ii) If the angle of incidence is changes to (a) 30°, (b) 60°, state whether the angle of deviation will be equal to, less than or more than 36°?
Answer:
(i) The angle of emergence is 48°
(ii) (a) The angle of deviation is less than 36° when the angle of incidence is 30°.
(b) The angle of deviation is more than 36° when the angle of incidence is 60°.
Explanation:
When the deviation is minimum, the angle of incidence is equal to angle of emergence.
i = e
∴ 48° = e
The angle of minimum deviation is given by the formula:
δ = i + e - A
Since, the prism used is equilateral glass prism, the angle of refraction is 60°
(a) δ = 30 + 48 - 60 = 18°
(b) δ = 60 + 48 - 60 = 48°