Momentum of a Photon

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Momentum of a Photon: Overview

This topic covers concepts, such as, Momentum of Photon & Derivation of De Broglie Equation etc.

Important Questions on Momentum of a Photon

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Which is the de-Broglie equation?

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Does, de Broglie hypothesis have any relevance to macroscopic matter?

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The de Broglie equation is one of the equations that is commonly used to define the wave properties of matter. It basically describes the wave nature of the _____.

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The de Broglie equation is one of the equations that is commonly used to define the wave properties of matter. It basically describes the wave nature of the electron.

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Derive De-Broglie equation?

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The total momentum delivered (for complete absorption) of energy flux of 30 W/cm2 falling on a non-reflecting surface of surface area 40 cm2 at normal incidence, during 30 minutes is found be N×10-4 SI units. Calculate the value of N.

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A free nucleus of mass 24 amu, initially at rest emits a gamma photon. The energy of the photon is 7MeV. The kinetic energy of recoiling nucleus is approximately in keV is.  [Take : 1 amu =9.31MeV ]

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A 1.5 kW (kilo-watt) laser beam of wavelength 6400 A is used to levitate a thin aluminium disk of same area as the cross-section of the beam. The laser light is reflected by the aluminium disk without any absorption. The mass of the foil is close to,

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A hydrogen atom with a velocity V absorbs a photon of wavelength 1650  and stops. If the mass of hydrogen atom is 1.6×10-27 kg, the value of V is (use h=6.6×10-34 J-sec)

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The energy of a photon of light beam A is twice that of photon of another light beam B. Then ratio of their momentum PA/PB is

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Light with an energy flux of 9 Wcm-2 falls on a non-reflecting surface at normal incidence. If the surface has an area of 20 cm2 . The total momentum delivered for complete absorption in one hour is

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The linear momentum of photon is p. The wavelength of photon is λ , then (h is Planck constant)

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Among the following statements, the one incorrect about photon is

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Calculate the energy of a photon with momentum 3.3×10-13 kg-ms-1, given Planck's constant to be 6.6×10-34 Js

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A parallel beam of light is incident normally on a plane surface absorbing 40% of the light and reflecting the rest. If the incident beam carries 60 W of power, the force exerted by it on the surface is

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A perfectly reflecting mirror has an area of 1 cm2. Light energy is allowed to fall on it for 1h at the rate of 10 Wcm-2. The force that acts on the mirror is

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When an electron jumps from a level n=4 to n=1, momentum of the recoiled hydrogen atom will be

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An atom of mass M which is in the state of rest emits a photon of wavelength λ. As a result, the atom will deflect with the kinetic energy equal to (h is Planck's constant)

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An atom of mass M which is in the state of rest emits a photon of wavelength λ. As a result, the atom will deflect with the kinetic energy equal to (h is Planck's constant)

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