4
PSMultiple Choice

At Home Part 2 — Unit test

Question 4 • Spanish I - WL9603 B

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

Answer
A
Ultraviolet light detects the presence of radioactive substances.
B
Ultraviolet light shows cold areas as blue and warm areas as red.
C
Ultraviolet light causes substances to fluoresce and give off visible light.
D
Ultraviolet light transmits information to AM and FM radio receivers.
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