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If the distance between point sources and the screen is doubled then the intensity of light becomes-

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Important Questions on Heat Transfer

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Alpha Question Bank for Medical: Physics>Chapter 16 - Heat Transfer>Exercise-1>Q 47
At T=200 K a black body emits maximum energy at a wavelength of 14 μm. Then at T=1000 K the body will emit maximum energy at a wavelength of-
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Alpha Question Bank for Medical: Physics>Chapter 16 - Heat Transfer>Exercise-1>Q 48
If the temperature of a black body is raised by 50%, then the energy emitted per second will be increased by an order of-
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Alpha Question Bank for Medical: Physics>Chapter 16 - Heat Transfer>Exercise-1>Q 49
Black body spectrum is
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Alpha Question Bank for Medical: Physics>Chapter 16 - Heat Transfer>Exercise-1>Q 50
There is a black spot on a body. If the body is heated and carried in dark room, then it glows more. This can be explained on the basis of
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Alpha Question Bank for Medical: Physics>Chapter 16 - Heat Transfer>Exercise-1>Q 51
A heated body emits radiation which has maximum intensity at frequency vm. If the temperature of the body is doubled:
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Alpha Question Bank for Medical: Physics>Chapter 16 - Heat Transfer>Exercise-1>Q 52
If λm denotes the wavelength at which the radiative emission from a black body at a temperature TK is maximum, then
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Alpha Question Bank for Medical: Physics>Chapter 16 - Heat Transfer>Exercise-1>Q 53
A black body at 1227°C emits radiations with maximum intensity at a wavelength of 5000Å. If the temperature of the body is increased by 1000°C, the maximum intensity will be at
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Alpha Question Bank for Medical: Physics>Chapter 16 - Heat Transfer>Exercise-1>Q 54
A black body is at 727°C. It emits energy at a rate which is proportional to