Chapter 28 – Dual Nature of Radiation and Matter
Sahay Sir > Question Answers > Cengage JEE Mains Physics by B.M Sharma > Chapter 28 - Dual Nature of Radiation and Matter
A photosensitive material is at 9 m to the left of the origin and the source of light is at 7 m to the right of the origin along x-axis. The photosensitive material and the source of light start from rest and move, respectively, with 8iˆms^−1 and 4iˆms^−1. The ratio of intensities at t=0 to t=3s as received by the photosensitive material is
04
Jun
A photosensitive material is at 9 m to the left of the origin and the source of light is at 7 m to the right of the origin along x-axis. The photosensitive material and the source of light start from rest and move, respectively, with 8iˆms^−1 and 4iˆms^−1. The ratio of intensities at t=0 to [...]
A particle of mass ‘m’ is projected from ground with velocity u making angle θ with the vertical. The de-Broglie wave length of the particle at the highest point is:
04
Jun
A particle of mass ‘m’ is projected from ground with velocity u making angle θ with the vertical. The de-Broglie wave length of the particle at the highest point is: A particle of mass 'm' is projected from ground with velocity u making angle θ with the vertical. The de-Broglie wave length of the particle [...]
All electrons ejected from a surface by incident light of wavelength 200nm can be stopped before traveling 1m in the direction of a uniform electric field of 4NC^−1. The work function of the surface is
04
Jun
All electrons ejected from a surface by incident light of wavelength 200nm can be stopped before traveling 1m in the direction of a uniform electric field of 4NC^−1. The work function of the surface is How many photons are emitted per second by a 5 m W laser source operating at 632.8 nm? June 4, [...]
Find the ratio of de Broglie wavelength of a proton and as α-particle which have been accelerated through same potential difference.
04
Jun
Find the ratio of de Broglie wavelength of a proton and as α-particle which have been accelerated through same potential difference. Find the ratio of de Broglie wavelength of a proton and as α-particle which have been accelerated through same potential difference. June 4, 2021 Category: Cengage JEE Mains Physics by B.M Sharma , Chapter [...]
An α-particle and a proton are fired through the same magnetic field which is perpendicular to their velocity vectors. The α-particles and the proton move such that radius of curvature of their paths is same. Find the ratio of their de Broglie wavelengths.
04
Jun
An α-particle and a proton are fired through the same magnetic field which is perpendicular to their velocity vectors. The α-particles and the proton move such that radius of curvature of their paths is same. Find the ratio of their de Broglie wavelengths. How many photons are emitted per second by a 5 m W [...]
What is the de Broglie wavelength of the wave associated with an electron that has been accelerated through a potential difference of 50.0 V ?
04
Jun
What is the de Broglie wavelength of the wave associated with an electron that has been accelerated through a potential difference of 50.0 V ? What is the de Broglie wavelength of the wave associated with an electron that has been accelerated through a potential difference of 50.0 V? June 4, 2021 Category: Cengage JEE [...]
How many photons of a radiation of wavelength λ=5×10^−7 m must fall per second on a blackened plate in order to produce a force of 6.62×10^−5 N?
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Jun
How many photons of a radiation of wavelength λ=5×10^−7 m must fall per second on a blackened plate in order to produce a force of 6.62×10^−5 N? How many photons of a radiation of wavelength λ=5×10^−7 m must fall per second on a blackened plate in order to produce a force of 6.62×10^−5 N? June [...]
A monochromatic source of light is placed at a large distance d From a metal surface. Photoelectrons are ejected at rate n, the kinetic energy being E. If the source is brought nearer to distance d/2, the rate and kinetic energy per photoelectron become nearly
04
Jun
A monochromatic source of light is placed at a large distance d From a metal surface. Photoelectrons are ejected at rate n, the kinetic energy being E. If the source is brought nearer to distance d/2, the rate and kinetic energy per photoelectron become nearly A monochromatic source of light is placed at a large [...]
A photon of wavelength 0.1 A is emitted by a helium atom as a consequence of the emission of photon. The KE gained by helium atom is
04
Jun
A photon of wavelength 0.1 A is emitted by a helium atom as a consequence of the emission of photon. The KE gained by helium atom is A photon of wavelength 0.1 A is emitted by a helium atom as a consequence of the emission of photon. The KE gained by helium atom is June [...]
The maximum velocity of electrons emitted from a metal surface is v. What would be the maximum velocity if the frequency of incident light is increased by a factor of 4?
04
Jun
The maximum velocity of electrons emitted from a metal surface is v. What would be the maximum velocity if the frequency of incident light is increased by a factor of 4? The maximum velocity of electrons emitted from a metal surface is v. What would be the maximum velocity if the frequency of incident light [...]