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Question : 13 of 150
Marks:
+1,
-0
Solution:
Let
θ is angle between incident ray vector and reflected ray vector.
Then, using
A⋅B=ABcosθ We have,
(+√3)⋅(−√3) =(√12+3)⋅(√12+3)⋅cosθ⇒(1−3)=×4×cosθ ⇒cosθ= or
θ=120∘ So, angle of incidence = 60°
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