A this glass prism (μ=1.5) in the position of minimum deviation deviates the monochromatic light ray by 10°, the refracting angle of prism is

Question

A this glass prism (μ=1.5) in the position of minimum deviation deviates the monochromatic light ray by 10°, the refracting angle of prism is (A)  20°  (B)  10°  (C)  30°  (D)  45°

Tardigrade Admin · Accepted Answer

Given: δm=10°, μ=1.5 For a thin prism of minimum deviation δm =(μ-1) A 10° =(1.5-1) A or A =(10/0.5)=20°

Q. A this glass prism $(μ = 1.5)$ in the position of minimum deviation deviates the monochromatic light ray by $1 0^{\circ}$ , the refracting angle of prism is

$2 0^{\circ}$

$1 0^{\circ}$

$3 0^{\circ}$

$4 5^{\circ}$

Given : $δ_{m} = 1 0^{\circ}, μ = 1.5$
For a thin prism of minimum deviation
$δ_{m} = (μ - 1) A$
$1 0^{\circ} = (1.5 - 1) A$ or $A = \frac{10}{0.5} = 2 0^{\circ}$

Q. A this glass prism (μ=1.5) in the position of minimum deviation deviates the monochromatic light ray by 10∘, the refracting angle of prism is

20∘

10∘

30∘

45∘