Question

What is the range of visible portion in EMR?

• A. 0.3~µm – 0.9~µm
• B. 0.4~µm – 0.7~µm
• C. 0.2~µm – 0.8~µm
• D. 0.5~µm – 0.9~µm

Hint:

Visible light lies between 0.4~µm and 0.7~µm in the electromagnetic spectrum.

Answer 1

The Correct Option is B

Electromagnetic radiation (EMR) covers a wide range of wavelengths from gamma rays to radio waves.
The visible portion of the EM spectrum refers to the range that the human eye can detect.
The typical visible light range is approximately from 0.4~µm (400 nm) to 0.7~µm (700 nm).
This range includes all the colors from violet to red that we can perceive.
Therefore, option (B) correctly specifies the visible portion of EMR.