| The organic molecules in sunscreen absorb the ultraviolet radiation and release it as heat. There are three types of ultraviolet light. Consider the following statements. |
| 1. UV-A is completely absorbed by the Earth's atmosphere. |
| 2. UV-B is partially blocked by the ozone layer and involved in tanning and burning of your skin i.e. sunburns. |
| 3. UV-C is not absorbed by the ozone and penetrates deeply into the skin and can lead to cancer and premature skin aging. |
| Which of the statement(s) given above is/are correct? |
A) 1 and 3
B) 1 and 2
C) Only 2
D) All of these
Correct Answer: C
Solution :
[c] Sunscreen combines organic and inorganic chemicals to filter the light from the Sun, so that less of it reaches the deeper layers of skin. The organic molecules in sunscreen absorb the ultraviolet radiation and release it as heat. The portion of the sunlight that is filtered or blocked is ultraviolet radiation. There are three types of ultraviolet light UV-A is not absorbed by the ozone and penetrates deeply into the skin and can lead to cancer and premature skin aging. UV-B is partially blocked by the ozone layer and involved in tanning and burning of your skin i.e. sunburns. UV-C is completely absorbed the Earth's atmosphere.
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