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The rest mass of the photon is...

The rest mass of the photon is

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The correct Answer is:
The rest mass of photon is zero.
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Which of the following is correct regarding photons? (i) A photon always travels at a speed 3xx10^(8)m//sec in vacuum. (ii) The rest mass of photon is zero. (iii) Let E and p be the energy and linear momentum of a photon and v and lambda be the frequency and wavelength of the same light when it behaves as a wave. Then E=h v =(hc)/(lambda) p=(h v)/(c) =(h)/(lambda) =(E)/(c) (iv) A photon may collide with a meterial particle. The total energy and the total momentum remain conserved in such a collision. The photon may get absorbed and / or a new photon may be emitted. Thus, the number of photons may not be consverved.

The rest mass of a photon of wavelength lambda is

What is the rest mass of photon?

The kinetic mass of a photon is given by

A free nucleus of mass 24 amu emits a gamma photon (when initially at rest). The energy of the photon is 7 MeV . The recoil energy of the nucleus in KeV is (Assuming 1 "amu"=931 MeV ).

RESONANCE-NUCLEAR CHEMISTRY-Board Level Exercise
  1. Calculate the number of electrons, protons and neutrons in the followi...

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  2. The rest mass of the photon is

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  4. Calculate the total number of electron is 1 mol of ammonia

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  8. The azimuthal quantum number l of an orbital is 3. What are the possib...

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  9. How many electrons in a fully filled f-subshell have m=0?

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  10. Why 3d sub-shell has higher energy than 4s sub-shell in a muti-electro...

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  11. Arrange the following type of radiations in increasing order of freque...

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  12. Calcultte the enrgy required for the process , He^+ (g) rarr He^(2+...

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  13. Calculate the wavelength a particle of mass m = 6.6 xx 10^(-27) kg mov...

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  14. If an electron is , to be located within 10pm. what will be the uncer...

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  15. How many sub-shell are there in N shell? How many orbitals are ther...

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  16. Consider the following radioactive change (11)^(22)Na rarr (10)^(22)Ne...

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  17. How many orbitals are possible in a. 4th energy level b. 5f sub-she...

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  18. How many spherical nodal surface are there in a. a 3s orbital b. a...

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  19. What is the number of d electrons in Cr^(3+) ions?

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  20. The mass of photon having wavelength 1 nm is :

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