Of the following, which wavelength range is visible to the human eye?
A) 950 nm
B) 870 nm
C) 770 nm
D) 500 nm
E) 380 nm

Question

Quizplus · Accepted Answer

The visible wavelength range for human eye is from 380 nm (violet) to 700 nm (red). Therefore, option D) 500 nm falls within the visible range and is visible to the human eye. Options A), B) and C) are longer wavelengths which fall outside the visible range and Option E) is a shorter wavelength than violet which is also outside the visible range.

Of the Following, Which Wavelength Range Is Visible to the Human