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Threshold frequency for a metal is 15×1014 Hz. The light of wavelength 6000 Å falls on the metal surface. Which one of the following statements is correct? [velocity of light, c=3×108 m s-1]

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Important Questions on Dual Nature of Matter and Radiation

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Physics Crash Course NEET>Chapter 19 - Dual Nature of Matter and Radiation>Level 1>Q 48

The photoelectric threshold for a certain metal surface is 360 Å. If the metal surface is irradiated by a wavelength of 1100 Å, the kinetic energy of the emitted photoelectrons is

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Physics Crash Course NEET>Chapter 19 - Dual Nature of Matter and Radiation>Level 1>Q 49
A beam of photons with an energy of 10.5 eV strike a metal plate. The photoelectrons are emitted with maximum velocity of 1.6×106 m s-1. The work function of the metal is
(Assume mass of electron =9×10-31 kg and Charge of electron =1.6×10-19C)
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Physics Crash Course NEET>Chapter 19 - Dual Nature of Matter and Radiation>Level 1>Q 50
At an incident radiation frequency of v1, which is greater than the threshold frequency, the stopping potential for a certain metal is V1. At frequency 2v1 the stopping potential is 3V1. If the stopping potential at frequency 4v1 is nV1, then n is
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Physics Crash Course NEET>Chapter 19 - Dual Nature of Matter and Radiation>Level 1>Q 51
Which is having minimum wavelength?
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Physics Crash Course NEET>Chapter 19 - Dual Nature of Matter and Radiation>Level 1>Q 52
When the energy of the incident radiation is increased by 20%, the kinetic energy of the photoelectrons emitted from a metal surface increased from 0.5eVto 0.8eV. The work function of the metal is 
 
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Physics Crash Course NEET>Chapter 19 - Dual Nature of Matter and Radiation>Level 2>Q 1
The ratio of wavelength of deuteron to that of proton accelerated by equal potential is:
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Physics Crash Course NEET>Chapter 19 - Dual Nature of Matter and Radiation>Level 2>Q 2
A particle A of mass m and initial velocity v collides with a particle B of mass m2 which is at rest. The m2 collision is head on, and elastic. The ratio of the de-Broglie wavelengths λA to λB after the collision is :
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Physics Crash Course NEET>Chapter 19 - Dual Nature of Matter and Radiation>Level 2>Q 3
Electrons with de-Broglie wavelength λ fall on the target in an X-ray tube. The cut-off wavelength of the emitted X-ray is: