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
Monochromatic light incident on a metal surface emits electrons with kinetic energies from zero to 2.6 eV. What is the least energy of the incident photon if the tightly bound electron needs 4.2eV to remove?
04
Jun
Monochromatic light incident on a metal surface emits electrons with kinetic energies from zero to 2.6 eV. What is the least energy of the incident photon if the tightly bound electron needs 4.2eV to remove? The work function of metal is W and λ is the wavelength of the incident radiation. There is no emission [...]
In the experiment on photoelectric effect, the graph between EK(max) and v is found to be a straight line as shown in fig. The threshold frequency and Planck’s constant according to this graph are
04
Jun
In the experiment on photoelectric effect, the graph between EK(max) and v is found to be a straight line as shown in fig. The threshold frequency and Planck’s constant according to this graph are In the experiment on photoelectric effect the graph between EK(max) and v is found to be a straight line as shown [...]
If a surface has work function of 3.00 eV, the longest wavelength of light which will cause the emission of electrons is.
04
Jun
If a surface has work function of 3.00 eV, the longest wavelength of light which will cause the emission of electrons is. If a surface has work function of 3.00 eV the longest wavelength of light which will cause the emission of electrons is June 4, 2021 Category: Cengage JEE Mains Physics by B.M Sharma [...]
The work function of metal is W and λ is the wavelength of the incident radiation. There is no emission of photoelectrons when
04
Jun
The work function of metal is W and λ is the wavelength of the incident radiation. There is no emission of photoelectrons when The work function of metal is W and λ is the wavelength of the incident radiation. There is no emission of photoelectrons when June 4, 2021 Category: Cengage JEE Mains Physics by [...]
If the intensity of radiation incident on a photocell be increased four times, then the number of photoelectrons and the energy of photoelectrons emitted respectively become.
04
Jun
If the intensity of radiation incident on a photocell be increased four times, then the number of photoelectrons and the energy of photoelectrons emitted respectively become. If the intensity of radiation incident on a photocell be increased four times then the number of photoelectrons and the energy of photoelectrons emitted respectively become June 4, 2021 [...]
Light of wavelength 0.6μm from a sodium lamp falls on a photocell and causes the emission of photoelectrons for which the stopping potential is 0.5 V. With light of wavelength 0.4μm from a mercury vapor lamp, the stopping potential is 1.5 V. Then, the work function [in electron volts] of the photocell surface is
04
Jun
Light of wavelength 0.6μm from a sodium lamp falls on a photocell and causes the emission of photoelectrons for which the stopping potential is 0.5 V. With light of wavelength 0.4μm from a mercury vapor lamp, the stopping potential is 1.5 V. Then, the work function [in electron volts] of the photocell surface is A [...]
Ultraviolet light of wavelength 300 nm and intensity 1.0 W m^-2 falls on the surface of a photosensitive material. If one per cent of the incident photons produce photoelectrons, then the number of photoelectrons emitted per second from an area of 1.0 cm^2 of the surface is nearly.
04
Jun
Ultraviolet light of wavelength 300 nm and intensity 1.0 W m^-2 falls on the surface of a photosensitive material. If one per cent of the incident photons produce photoelectrons, then the number of photoelectrons emitted per second from an area of 1.0 cm^2 of the surface is nearly. then the number of photoelectrons emitted per [...]
A particle of mass 10^−31 kg is moving with a velocity equal to 10^5ms^−1. The wavelength of the particle is equal to:
04
Jun
A particle of mass 10^−31 kg is moving with a velocity equal to 10^5ms^−1. The wavelength of the particle is equal to: A particle of mass 10^−31 kg is moving with a velocity equal to 10^5ms^−1. The wavelength of the particle is equal to: June 4, 2021 Category: Cengage JEE Mains Physics by B.M Sharma [...]