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3 years ago

I really need the answer

Physics

1 answer:

Vilka [71]3 years ago

7 0

Answer:

The first answer is correct. All of the other options include sound, which travels by material force, and can not be transmitted in a vacuum. Infra-red, radio, and microwaves are all different frequencies of light, and can thus travel through a vacuum.

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Explanation:

Given that,

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Using formula of intensity

$I=\dfrac{P_{avg}}{4\pi r^2}$

Where, I = intensity

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Answer:

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