A ray of light is incident upon a plane mirror surface at an angle 60,calculate the angle of deviation
To calculate the angle of deviation, we need to understand the principles of reflection.
When a ray of light strikes a plane mirror, it is reflected at the same angle at which it approaches the mirror. The angle between the incident ray and the normal (an imaginary line drawn perpendicular to the mirror surface) is called the angle of incidence. Similarly, the angle between the reflected ray and the normal is the angle of reflection.
In the case of a plane mirror, the angle of incidence is equal to the angle of reflection. So, if the incident ray makes an angle of 60° with the mirror surface, the angle of reflection will also be 60°.
To calculate the angle of deviation, we use the formula:
Angle of deviation = 2 * (angle of incidence - angle of reflection)
Substituting the values, we have:
Angle of deviation = 2 * (60° - 60°)
Angle of deviation = 2 * 0°
Angle of deviation = 0°
Therefore, the angle of deviation when a ray of light is incident upon a plane mirror surface at an angle of 60° is 0°.