Question

Give the range of wavelength of the electromagnetic waves visible to us.

• A. $1000A^o$ to $4000A^o$
• B. $4000A^o$ to $8000A^o$
• C. $8000A^o$ to $9000A^o$
• D. $400A^o$ to $800A^o$

Answer 1

Answer: (B)

$4000A^o$ to $8000A^o$

The electromagnetic spectrum consists of all the different wavelengths of electromagnetic radiation, including light, radio waves, and X-rays. Ultraviolet light has shorter wavelengths than radio light and Infra red light has longer wavelengths than gamma light. The only region in the entire electromagnetic spectrum that our eyes are sensitive to is the visible region.
Hence, the visible range of electromagnetic spectrum is $4000\mathring{A}-8000\mathring{A}$.