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Intensity of electromagnetic wave is 0.0...

Intensity of electromagnetic wave is 0.02 `"wattmeter"^(-2)` and its velocity in space is `3xx10^(8)ms^(-1)` then energy density of radiation is ….. `Jm^(-2)`

A

`6.67xx10^(11)`

B

`6.67xx10^(-11)`

C

`1.5xx10^(10)`

D

`1.5xx10^(-10)`

Text Solution

Verified by Experts

The correct Answer is:
B
`rho =(I)/(c )=(0.02)/(3xx10^(8))=6.67xx10^(-11)Jm^(-2)`.
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KUMAR PRAKASHAN-ELECTROMAGNETIC WAVES-SECTION D MULTIPLE CHOICE QUESTIONS (MCQs)
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  5. Which of the following is dimensional formula of intensity of radiatio...

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  7. Which of following waves are used for sonography ?

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  8. Which of following waves cannot propagate in vacuum ?

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  10. Which of following are not electromagnetic waves ?

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  11. In the following list of different electromagnetic waves and its sourc...

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  14. For navigation in sea, …. waves are useful.

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  15. …. radiation is emitted by hot bodies.

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  17. Given the frequency of microwave used by microwave oven to cook food.

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  19. ….. can be used to cook the food.

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