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) encompasses wavelengths from gamma rays to radio waves.
The visible portion of the EM spectrum is the range detectable by the human eye.
Visible light typically spans approximately 0.4~µm (400 nm) to 0.7~µm (700 nm).
This spectrum includes all perceived colors from violet to red.
Consequently, option (B) accurately defines the visible portion of EMR.