Which relation is correct for the energy of a photon:

1. E = hc/λ
2. E = hν
3. E = hcῡ
4. All of these
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Answer: D
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Quantum theory provided a basis for explaining the;

1. photoelectric effect
2. atomic spectra
3. atomic and molecular structures
4. all of these
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Answer: D
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The ejection of electrons from a metal surface when high frequency light strike it, is called;

1. compton effect
2. photoelectric effect
3. stark effcet
4. disintegration
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Answer: B
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In photoelectric effect, the K.E of photoelectrons increases linearly with;

1. wavelength of incident light
2. velocity of incident light
3. frequency of incident light
4. none of these
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Answer: C
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An increase in the intensity of incident light increases;

1. the rate of emmision of electrons
2. K.E of individual photons
3. energy of photoelectrons
4. all of these
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Answer: A
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The frequency which provides minimum energy that photons must possess in order to produce photoelectric effect is called;

1. constancy
2. threshold frequency
3. incident frequency
4. none of these
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Answer: B
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In photoelectric effect, a part of photons energy is used to remove the electrons from metal surface while the remaining part

1. increases temperature of metal surface
2. increases number of photoelectrons
3. increases K.E of photoelectrons
4. none of these
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Answer: C
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h?o is constant for a particular solid, and is called

1. threshold frequency
2. work function
3. Planck's constant
4. none of these
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Answer: B
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The increase in wavelength of x-rays when it is scattered by an electron is called

1. photoelectric effect
2. compton effect
3. common ion effect
4. none of these
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Answer: B
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Which effect is like a ball hitting a stationay ball which is pushed away while the energy of the striking ball decreases;

1. photoelectric effect
2. compton effect
3. common ion effect
4. none of these
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Answer: B
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