De Broglie Wavelength

The momentum of a photon of energy 1 MeV in kg m/s, will be:

1. $0.33\backslash times{10}^6$

2. $7\backslash times{10}^{-24}$

3. ${10}^{-22}$

4. $5\backslash times{10}^{-22}$

A particle of mass mg has the same wavelength as an electron moving with a velocity of ms^-1. The velocity of the particle is:
(Mass of electron = kg)
1.
2.
3.
4.

A radioactive nucleus of mass M emits a photon of frequency $\nu$ and the nucleus will recoil. The recoil energy will be:

1. $\frac{{\mathrm{h}}^2{\mathrm{\nu }}^2}{2{\mathrm{Mc}}^2}$

2. zero

3. $\frac{\mathrm{h\nu }}{\mathrm{c}\sqrt{2\mathrm{M}}}$

4. $\frac{\mathrm{c}\sqrt{2\mathrm{M}}}{\mathrm{h\nu }}$

An particle moves in a circular path of radius in the presence of a magnetic field of The de-Broglie wavelength associated with the particle will be:
1.
2.
3.
4.

Light of wavelength is incident on metal with work function . The de-Broglie wavelength of the emitted electron is:

The de-Broglie wavelength of a neutron in thermal equilibrium with heavy water at a temperature (kelvin) and mass , is:

An electron of mass with an initial velocity $\stackrel{}{}$ enters in an electric field at If ${\mathrm{}}_{}$ is its de-Broglie wavelength initially, then what will be its de-Broglie wavelength at time

An electron is accelerated through a potential difference of . Its de-Broglie wavelength is, (nearly):

1.
2.
3.
4.

An electromagnetic wave of wavelength is incident on a photosensitive surface of negligible work function. If ' ' is the mass of photoelectron emitted from the surface and is the de-Broglie wavelength, then:

A photon and an electron (of mass ) have the same total energy If denotes the speed of light, what is the ratio of their de-Broglie wavelengths