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Question

How much energy does sun release in the form of radiation?

A
3.8×1024 joule/second
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B
3.8×1026 joule/second
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C
1.7×1017 joule/second
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D
1.7×1026 joule/second
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Solution

The correct option is B 3.8×1026 joule/second

Sunlight is a portion of the electromagnetic radiation given off by the Sun, in particular infrared, visible, and ultraviolet light. On Earth, sunlight is filtered through Earth's atmosphere, and is obvious as daylight when the Sun is above the horizon.

The Sun releases an estimated 384.6 yotta watts (3.846×1026 W) of energy in the form of light and other forms of radiation. We are able to survive on Earth because the energy is spread over the area of a sphere with a radius of approximately 93,000,000 miles. At the upper reaches of our atmosphere, the energy density of solar radiation is approximately 1368W/m2. At the Earth's surface, the energy density is reduced to approximately 1000W/m2 for a surface perpendicular to the Sun's rays at sea level on a clear day.


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