Question

the table below compares electromagnetic waves.

region	frequency (hz)	hazard to humans
ultraviolet	(10^{15} - 10^{17})	sunburn, skin cancer
x - rays	(10^{17} - 10^{19})	cell and tissue damage
gamma rays	(> 10^{19})	dna mutation, radiation sickness

which type of wave is most hazardous to humans?

a gamma rays
b x - rays
c ultraviolet
d infrared

Explanation:

To determine the most hazardous wave, we analyze the "Hazard to Humans" column. Infrared causes skin warming, Ultraviolet causes sunburn/skin cancer, X - rays cause cell/tissue damage, and Gamma rays cause DNA mutation and radiation sickness. DNA mutation and radiation sickness are more severe than the other hazards, so Gamma rays are the most hazardous.

Answer:

A. Gamma rays