Question

The property of light which does not change, when it travels from one medium to another is ______.

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

Hint:

Frequency of light is source-dependent and remains constant across media; speed and wavelength adjust.

Answer 1

The Correct Option is C

When light travels from one medium to another, its speed and wavelength change due to the refractive index (\( v = \frac{c}{n} \), \( \lambda = \frac{\lambda_0}{n} \)). Frequency remains constant as it depends on the source, not the medium (\( v = f \lambda \)).
Answer: frequency.