Question

A light ray makes an incident angle 400
. If the mirror is rotated such that the mirror makes an angle
with the incident ray 400 , then by how much will the reflected ray be rotated?

Answer 1

Answer on Question #50132, Physics, Optics

Task: A light ray makes an incident angle $40{}^{\circ}$ . If the mirror is rotated such that the mirror makes an angle with the incident ray $40{}^{\circ}$ , then by how much will the reflected ray be rotated?

Answer:

If the mirror is rotated through an angle $\theta$ , then the reflected ray will be rotated through an angle $2\theta$ .

$$\alpha = 4 0 ^ {0}, s o \beta = 5 0 ^ {0}$$ $$\alpha^ {\prime} = 4 0 ^ {0} \Rightarrow \theta = 1 0 ^ {0}$$

reflected ray will be rotated through an angle $20{}^{\circ}$

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