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Why UV radiation is higher in summer?
- a)The Sun is closer to planet earth so UV rays have a shorter distance to travel to reach us
- b)There is more ozone in the atmosphere during summer
- c)The sun is particularly busy in summer
- d)None of these
Correct answer is option 'A'. Can you explain this answer?
Most Upvoted Answer
Why UV radiation is higher in summer?a)The Sun is closer to planet ear...
UV radiation is higher in summer because:
1. The angle of the sun's rays:
During summer, the earth tilts towards the sun which makes the angle of the sun's rays more direct. This means that the UV radiation has a shorter distance to travel to reach the earth's surface, making it more intense.
2. Less atmosphere to filter UV radiation:
When the sun's rays hit the earth at a more direct angle, they pass through less atmosphere before reaching the surface. The atmosphere filters UV radiation, so less atmosphere means that more UV radiation reaches the earth's surface.
3. The thinner ozone layer:
The ozone layer is a protective shield in the earth's atmosphere that absorbs much of the sun's harmful UV radiation. During summer, the ozone layer above the poles thins out due to chemical reactions, which causes more UV radiation to pass through to the earth's surface.
4. Longer days:
During summer, the days are longer, which means that the sun is in the sky for a longer period of time. This results in more time for UV radiation to reach the earth's surface.
Therefore, the combination of a more direct angle of the sun's rays, less atmosphere to filter UV radiation, a thinner ozone layer, and longer days, all contribute to higher levels of UV radiation during summer.
1. The angle of the sun's rays:
During summer, the earth tilts towards the sun which makes the angle of the sun's rays more direct. This means that the UV radiation has a shorter distance to travel to reach the earth's surface, making it more intense.
2. Less atmosphere to filter UV radiation:
When the sun's rays hit the earth at a more direct angle, they pass through less atmosphere before reaching the surface. The atmosphere filters UV radiation, so less atmosphere means that more UV radiation reaches the earth's surface.
3. The thinner ozone layer:
The ozone layer is a protective shield in the earth's atmosphere that absorbs much of the sun's harmful UV radiation. During summer, the ozone layer above the poles thins out due to chemical reactions, which causes more UV radiation to pass through to the earth's surface.
4. Longer days:
During summer, the days are longer, which means that the sun is in the sky for a longer period of time. This results in more time for UV radiation to reach the earth's surface.
Therefore, the combination of a more direct angle of the sun's rays, less atmosphere to filter UV radiation, a thinner ozone layer, and longer days, all contribute to higher levels of UV radiation during summer.
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Community Answer
Why UV radiation is higher in summer?a)The Sun is closer to planet ear...
The Sun being closer to Earth in summers can cause the radiations to reach faster and thus cause more heat and UV rays.
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Why UV radiation is higher in summer?a)The Sun is closer to planet earth so UV rays have a shorter distance to travel to reach usb)There is more ozone in the atmosphere during summerc)The sun is particularly busy in summerd)None of theseCorrect answer is option 'A'. Can you explain this answer?
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