Question

The property of light which remains unchanged when it travels from one medium to another is ........

• A. velocity
• B. wavelength
• C. amplitude
• D. frequency

Hint:

The frequency of light remains constant, while the velocity and wavelength can change when transitioning between media.

Answer 1

The Correct Option is D

Step 1: Properties of light.
When light travels from one medium to another, its frequency remains unchanged, but its velocity and wavelength may change depending on the properties of the mediums.
Step 2: Analyzing the options.

- (1) velocity: Incorrect. Velocity changes when light moves from one medium to another.
- (2) wavelength: Incorrect. Wavelength changes depending on the refractive index of the medium.
- (3) amplitude: Incorrect. The amplitude can change due to the intensity of the light.
- (4) frequency: Correct. The frequency of light remains constant when it transitions between different media.

Step 3: Conclusion.
The property of light that remains unchanged when it travels from one medium to another is the frequency, corresponding to option (4).