Question

The wavelength of radiation emitted by a body depends upon:

• A. the nature of its surface
• B. the area of its surface
• C. the temperature of its surface
• D. All of the above

Hint:

Higher temperature means shorter wavelength of emitted radiation.

Answer 1

The Correct Option is C

Step 1: According to Wien’s displacement law: \[ \lambda_{\max} T = \text{constant} \]
Step 2: Wavelength depends only on temperature, not on nature or area.