an incident ray makes an angle of 20 degree with the plane mirror.what would be the measure of angle of reflection?
According to the law of reflection, the angle of incidence is equal to the angle of reflection. Therefore, if the incident ray makes an angle of 20 degrees with the plane mirror, the measure of the angle of reflection will also be 20 degrees.
To find the measure of the angle of reflection, you need to apply the law of reflection. According to this law, the angle of incidence is equal to the angle of reflection.
Given that the incident ray makes an angle of 20 degrees with the plane mirror, we can conclude that the angle of incidence is 20 degrees. Therefore, the measure of the angle of reflection will also be 20 degrees.
To generalize, in the case of a plane mirror, the angle of incidence and the angle of reflection are always equal.