Question
Question: The angle of minimum deviation from prism of angle \(3 \times 10 ^ { 8 } \mathrm {~ms} ^ { - 1 }\)th...
The angle of minimum deviation from prism of angle 3×108 ms−1then the velocity of light in material of the prism is :
A
2.12×108 ms−1
B
1.12×108 ms−1
C
4.12×108 ms−1
D
5.12×108 ms−1
Answer
2.12×108 ms−1
Explanation
Solution
: Using,
Here, A=3π=60∘,δm=6π=30∘,c=3×108 ms−1
∴μ=sin60∘/2sin(60∘+30∘)/2=0.5007071=1.414
Therefore,
v=2.12×108 ms−1