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A particle which has zero rest mass and ...

A particle which has zero rest mass and non - zero energy and momentum must travel with a speed

A

Equal to `c` , the speed of light in vacuum

B

Greater than `c`

C

Less than `c`

D

Tending to infinity

Text Solution

Verified by Experts

The correct Answer is:
A
Particle is Photon and it travels with the velocity equal to light in vaccum.
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A2Z-DUAL NATURE OF RADIATION AND MATTER-Section D - Chapter End Test
  1. A particle which has zero rest mass and non - zero energy and momentum...

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  2. If a photon has velocity c and frequency n , then which of following r...

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  3. Lights of two different frequencies whose photons have energies 1 and ...

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  4. Sodium and copper have work functions 2.3 eV and 4.5 eV respectively ....

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  5. Two identical photocathodes receive light of frequency f(1) andf(2) if...

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  6. The work function of a substance is 4.0 eV. The longest wavelength of ...

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  7. According to Einstein's photoelectric equation, the plot of the maximu...

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  8. A photocell is illuminated by a small bright source places 1 m away w...

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  9. If the kinetic energy of a free electron doubles , its de - Broglie wa...

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  10. In a photoelectric effect , the K.E. of electrons emitted from the met...

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  11. The photoelectric effect can be understood on the basis of

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  12. If the threshold wavelength for sodium is 5420 Å, then the work functi...

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  13. The magnitude of saturation photoelectric current depends upon

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  14. For photoelectric emission , tungsten requires light of 2300 Å. If lig...

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  15. The light rays having photons of energy 1.8 eV are falling on a metal ...

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  16. A photon of energy 8 eV is incident on metal surface of threshold fre...

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  17. In the diagram a graph between the intensity of X-rays emitted by a mo...

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  18. The maximum value of stopping potential in the following diagram is

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  19. The variation of wavelength lambda of the K(alpha) line with atomic nu...

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  20. From the figure describing photoelectric effect we may infer correctly...

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  21. When an inert gas is filled in the place vacuum in a photo cell , then

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