The only difference in both is that in concave mirror this reflected ray passes through the focus. A ray of monochromatic light traveling in air is incident on a plane mirror at an angle of 30., as shown in the diagram below.
This is also applicable on any surface till now, both concave and convex mirror. The angle of incident angle of reflection. The reflected angle is always equal to the incident angle for all the light rays. Now suppose the mirror is moving with velocity $\overline v$ in the frame $\Sigma$, and let the frame of the mirror be $\Sigma'$. Explanation: The law of relection is a very good guess to understand the behaviour of how light travels. A mirror with a flat or planar reflective surface is called a plane mirror. Obviously if it is at rest the canonical law of reflection $\theta_i=\theta_r$ holds. the image is virtual and erect in nature is. The image which is present in the mirror is obtained behind the plane. According to the laws of reflection, the angle of incidence is equal to the angle of reflection ( i r). The angle of incidence equals the angle of reflection, at a movement against an obstacle and a reflection or rebound there. The convention used to express the direction of a light ray is to indicate the angle which the light ray makes with a normal line drawn to the surface of the mirror. Reflection involves a change in direction of the light ray. Let $S$ be a perfectly reflecting mirrror. When the light rays which gets strokes over the flat mirror and get reflected back. When a ray of light strikes a plane mirror, the light ray reflects off the mirror. I am following a training course and came across this proof, from my colleague, that the ordinary law of reflection $\theta_i = \theta_r$ does not hold in relativity:
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