Question

When a ray of light enters a glass slab, then

• A. its frequency and velocity changes
• B. only frequency changes
• C. its frequency and wavelength changes
• D. its frequency does not change

Answer 1

Answer: (D)

When a ray of light enters a glassslab its frequency does not change. This is because frequency is the property of the source emitting the radiation. And once the light is emitted, its frequency remains same in all the media it propagates through.