Question

if the reflected ray is rotated by angle 4 theta clockwise direction then mirror rotated by

Answer 1

Answer:

If reflected ray is rotated by $4\Theta$ then mirror will be rotated by $2\Theta$

Explanation:

At the point when the mirror is rotated at an angle theta , the incident ray will fall on the mirror making an angle  of 2 theta with the typical .

As we know that angle of incidence is always equal to angle of reflection

So if mirror is rotated by $\Theta$ then reflected ray will also rotated by $2\Theta$

In question it is given that reflected ray is rotated by $4\Theta$

So mirror will be rotated by $\frac{4\Theta }{2}=2\Theta$