EASY
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IMPORTANT
Earn 100
Calculate the number of photons emitted by a 60 W bulb per second, if 10% of the electrical energy supplied ( E=3.3 x 10-19 ) to an incandescent light bulb is radiated as visible light
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Important Questions on Dual Nature of Radiation and Matter
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CUET (UG)
IMPORTANT
Which of the following statements about photon is incorrect
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CUET (UG)
IMPORTANT
The energy of photons of visible light with maximum wavelength in is approximately
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CUET (UG)
IMPORTANT
If is the Planck's constant, then the momentum of a photon of wavelength is
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CUET (UG)
IMPORTANT
The energy of photons in a beam whose wavelength is is
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CUET (UG)
IMPORTANT
As a satellite sweeps past the Earth with a speed of it sends out a pulse of light ahead of it. How fast does the light pulse move as observed by a person on the Earth? ( velocity of light)
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CUET (UG)
IMPORTANT
In electron microscope electron beam is, used to obtain image of an object. If neutron beam of same energy is used to obtain image, resolving power of microscope will
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CUET (UG)
IMPORTANT
The resistance of a discharge tube is_____.
EASY
CUET (UG)
IMPORTANT
Light is incident normally on a completely absorbing surface with an energy flux of . If the surface has an area of , the momentum transferred to the surface in time duration will be:
