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Gauss's Law

Consider the ...

Question

Consider the following statements.
$1.$ Stefan's constant is the same for all black bodies.
$2.$ Thermal radiations travel with the speed of $3 \times 10^{8} m / s$ .
$3.$ Thermal radiation exhibit diffraction.
$4.$ Stefan's law is applicable for all heated bodies.
Which of the statements given above are correct?

A

1, 3

and

4

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B

2, 3,

and

4

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C

1, 2

and

3

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D

1, 2, 3

and

4

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Solution

The correct option is C $1, 2$ and $3$
Stefan's law is applicable to black bodies only and not for all the bodies. So, statement 4 is incorrect.

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1.

Thermal radiation are electromagnetic waves.

2.

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3.

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4.

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σ

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