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A body is kept inside a container the te...

A body is kept inside a container the temperature of the body is `T_(1)` and the temperature of the container is `T_(2)` the rate at which body absorbs the energy is `alpha` The emissivity of the body is The radiation striking the body is either absorbed or reflected
A good absorber is .

A

good reflector

B

poor reflector

C

average reflector

D

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Text Solution

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The correct Answer is:
B
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Knowledge Check

  • A body is kept inside a container the temperature of the body is T_(1) and the temperature of the container is T_(2) the rate at which body absorbs the energy is alpha The emissivity of the body is The radiation striking the body is either absorbed or reflected At what rate of body will basorb the radiant energy .

    A
    `alpha`, but `alpha ne e`
    B
    `(T_(1)-T_(2))//t` where is the time
    C
    e, but `e = alpha`
    D
    None of these
  • A body is kept inside a container the temperature of the body is T_(1) and the temperature of the container is T_(2) the rate at which body absorbs the energy is alpha The emissivity of the body is The radiation striking the body is either absorbed or reflected Ater a long time the temperature of the body will be .

    A
    `T_(1)`
    B
    `T_(2)`
    C
    `T_(1) +(T_(1)-T_(2))/(2)`
    D
    None of these
  • The temperature at which a black body ceases to radiate energy is .

    A
    `0 K`
    B
    `273 K`
    C
    `-273 k`
    D
    at all temperatures
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