Question

If humans cannot see ultraviolet waves, how can ultraviolet light be used to gather evidence of a crime?

Answer 1

The anser is Ultraviolet light causes substances to fluoresce and give off visible light. (C)

Step-by-step explanation:

Answer 2

It seems that you have missed the given options for this question, but anyway, here is the correct answer. If humans cannot see ultraviolet waves, ultraviolet light can be used to gather evidence of a crime since ultraviolet light causes substances to fluoresce and give off visible light. Hope this is the answer that you are looking for. Thanks for posting!