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Q. 37

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Physics for Scientists and Engineers: A Strategic Approach with Modern Physics
Found in: Page 452

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Short Answer

The sun emits electromagnetic waves with a power of 4.0 * 1026 W. Determine the intensity of electromagnetic waves from the sun just outside the atmospheres of Venus, the earth, and Mars.

The intensity of electromagnetic waves from the sun just outside the atmospheres of Venus is .

The intensity of electromagnetic waves from the sun just outside the atmospheres of Earth is .

The intensity of electromagnetic waves from the sun just outside the atmospheres of Mars is .

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Step by Step Solution

Given information

Power of electromagnetic wave is

The intensity of electromagnetic waves from the sun just outside the atmospheres of Venus 

The intensity of the electromagnetic wave is given by .

The distance between the Sun and Venus is .

Substitute the given values

Therefore, the intensity of electromagnetic waves from the sun just outside the atmospheres of Venus is .

The intensity of electromagnetic waves from the sun just outside the atmospheres of Earth 

The distance between the Sun and Earth is .

Substitute the given values into the equation

Therefore, the intensity of electromagnetic waves from the sun just outside the atmosphere of Earth .

The intensity of electromagnetic waves from the sun just outside the atmospheres of Earth 

The distance between the Sun and Mars is .

Substitute the given values into the equation

Therefore, the intensity of electromagnetic waves from the sun just outside the atmosphere of Mars is .

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