Question

Suppose you are in an empty room which only contains UV-light. Will you be able to see walls? What is the range of wavelength of light we can see?

Answer 1

We can not see walls as our eyes are not able to see UV lights....but we can see the walls if we wear UV detecting glasses...

The visible spectrum is the portion of the electromagnetic spectrum that is visible to the human eye. Electromagnetic radiation in this range of wavelengths is called visible light or simply light. A typical human eye will respond to wavelengths from about 390 to 700 nm.