Question

When light goes from one medium to another then, which of the properties of light will not change?

• A. speed
• B. wavelength
• C. frequency
• D. colour

Answer 1

Answer: (C), (D)

colour

Explanation of the correct answer

C. frequency

1. When light travels through one medium then another its frequency remains the same
2. But on the other hand the properties like wavelength, and speed of light change when light travels from one medium to another.
3. So, Since frequency remains constant. But, the wavelength vary because the speed of light changes according to the medium.

D. Colour

1. When light travels through one medium then another its colour also remains the same because the colour of light is also identified by the frequency of the medium.
2. Since frequency remains constant. So, the colour of light also remains the same as it travels through one medium and then another.

Thus, options C and D are the correct answer.