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A surface at temperature T(0)K receives ...

A surface at temperature `T_(0)K` receives power `P` by radiation from a small sphere at temperature `T ltT_(0)` and at a distance d. If both `T` and d are doubled the power received by the surface will become .

A

`P`

B

`2P`

C

`4P`

D

`16P`

Text Solution

Verified by Experts

The correct Answer is:
C
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Knowledge Check

  • The power P is received by a surface at temperature T_(0)K from a small sphere at temperature

    A
    `T(T gt gt T_(0))` and at a distance `'d'`. If both `'T'` and `'d'` are doubled, then power received by surface will become
    B
    `P`
    C
    `2P`
    D
    `4P`

  • A black metal foil is warmed by radiation from a small sphere at temperature T and at a distance d it is found that the power received by the foil is P If both the temperature and the distance are doubled the power received by the foil will be .

    A
    `64P`
    B
    `16P`
    C
    `4P`
    D
    `8P`

  • Radiation from a black body at the thermodynamic temperature T_(1) is measured by a small detector at distance d_(1) from it. When the temperature is increased to T_(2) and the distance to d_(2) , the power received by the detector is unchanged. What is the ratio d_(2)//d_(1) ?

    A
    `(T_(2))/(T_(1))`
    B
    `(T_(2))/(T_(1)^(2))`
    C
    `((T_(1))/(T_(2)))_(2)^(2)`
    D
    `((T_(2))/(T_(1)))^(4)`

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