Question

when a plane mirror is rotated by an angle theta what will be the angle of rotation of the reflected ray for the fixed instantly​

Answer 1

Answer:

the rotation would be double the angle=2theta

Answer 2

Answer: Make it brainliest answer

Explanation:Angle of Reflection increases by  if plane mirror is rotated through an angle

Solution:  

The plane mirror when incident with ray of light at an angle, it reflects the ray at the same angle. But when the mirror is rotated by an angle of theta, ray reflected will have twice the angle as 2 theta, because of the following reason,

As we know, Angle of incidence = Angle of reflection

Assume Angle of incidence=Angle =Angle of reflection

Therefore when plane mirror is rotated by θ angle, the normal is moved by \theta angle and angle of incidence, so angle of incidence 2 will now becomes –

Angle of incidence 2=Angle

So, Angle of reflection will now be –

Angle of reflection 2=Angle

Angle of reflection 2=Angle

Therefore, Angle of reflection increases by .