Question

When a light ray falls on a perfectly reflective mirror at an angle. Identify which of the following statement is true about the ray?

• A. The frequency of the light ray changes
• B. The wavelength of the light ray changes
• C. The velocity of the light ray changes
• D. The period of the light ray changes
• E. The direction of motion of the light ray changes

Answer 1

The correct option is E The direction of motion of the light ray changes

When a light ray falls on a perfectly reflective mirror at some angle, then only the direction of the light rays changes such that the angle of incidence is equal to the angle of reflection but the frequency, wavelength, time period and the velocity of the light remain constant.

Thus option E is correct.