Why is UVC sunlight less dangerous to humans than UVB even if the energy of UVC radiation is higher?
a. The UVC radiation is absorbed by ozone in the earth's atmosphere but UVB is not.
b. The UVC damage can be repaired by special enzymes in our body but UVB cannot.
c. UVB light can be lethal but UVC cannot.
d. There are no substances (and sunblock lotions) that absorb UVB but we have a plenty of them absorbing in UVC.
e. none of these
Answer: a. The UVC radiation is absorbed by ozone in the earth's atmosphere but UVB is not.