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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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Important Questions on Relativity

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The number of photons falling per second on a completely darkened plate to produce a force of 6.62×10-5 N is n. If the wavelength of the light falling is 5×10-7 m, then n=×1022.h=6.62×10-34 J-s
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Given below are two statements:

Statement I: Two photons having equal linear momenta have equal wavelengths.

Statement II: If the wavelength of the photon is decreased, then the momentum and energy of a photon will also decrease.

In the light of the above statements, choose the correct answer from the options given below.

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Two particles move at right angle to each other. Their de Broglie wavelengths are λ1 and λ2 respectively. The particles suffer perfectly inelastic collision. The de Broglie wavelength λ of the final particle, is given by:
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A light beam of intensity 20 W cm-2 is incident normally on a perfectly reflecting surface of sides 25 cm×15 cm. The momentum imparted to the surface by the light per second is
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Among the following statements, the one incorrect about photon is
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n photons of wavelength λ are absorbed by a black body of mass m. The momentum gained by the body is
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A hydrogen atom emits a photon corresponding to an electron transition from n=5 to n=1. The recoil speed of hydrogen atom is almost (mass of proton =1.6×10-27 kg)
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What is the momentum of a photon having a frequency of 1.5 × 1013 Hz?
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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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A radiation of energy E falls normally on a perfectly reflecting surface. The momentum transferred to the surface 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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Calculate the linear momentum of a 3 MeV photon.
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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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If h is Planck's constant, the momentum of a photon of wavelength 0.01  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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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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If h is Planck's constant, the momentum of a photon of wavelength 0.01 A is
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Photon of frequency υ has a momentum associated with it. If c is the velocity of light, the momentum 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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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 _____.