Chapter 11 – Dual Nature of Radiation and Matter
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If Kinetic energy of the emitted electrons is zero when light of wavelength 686 nm. Then wavelength of radiations emitted by electron having energy 1.81 eV will be. ( Given work function of Cesium = 1.81 eV)
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Nov
If Kinetic energy of the emitted electrons is zero when light of wavelength 686 nm. Then wavelength of radiations emitted by electron having energy 1.81 eV will be. ( Given work function of Cesium = 1.81 eV) Ultraviolet beam of wavelength 280 nm is incident on lithium surface of work function 2.5 eV. The maximum [...]
When a photosensitive surface is illuminated with light of wavelength lambda , the stopping potential is v0. But when light of wavelength 2 lambda is incident on the same surface, the stopping potential is V0/8. What is the threshold wavelength for the surface ?
29
Nov
When a photosensitive surface is illuminated with light of wavelength lambda , the stopping potential is v0. But when light of wavelength 2 lambda is incident on the same surface, the stopping potential is V0/8. What is the threshold wavelength for the surface ? the stopping potential is v0. But when light of wavelength 2 [...]
Light of wavelength 0.6 mm 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 0.4 mm from a sodium lamp, the stopping potential is 1.5 V. With this data, the value of h/e is:
29
Nov
Light of wavelength 0.6 mm 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 0.4 mm from a sodium lamp, the stopping potential is 1.5 V. With this data, the value of h/e is: Ultraviolet beam of wavelength [...]
The threshold frequency of the metal of the cathode in a photoelectric cell is 1×10^15Hz. When a certain beam of light is incident on the cathode, it is found that a stopping potential 4.144 V is required to reduce the current to zero. The frequency of the incident radiation is
29
Nov
The threshold frequency of the metal of the cathode in a photoelectric cell is 1×10^15Hz. When a certain beam of light is incident on the cathode, it is found that a stopping potential 4.144 V is required to reduce the current to zero. The frequency of the incident radiation is it is found that a [...]
In an experiment of photoelectric effect the stopping potential was measured to be V1 and V2 volts with incident light of wavelength λ and λ/2, respectively. The relation between V1 and V2 may be
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Nov
In an experiment of photoelectric effect the stopping potential was measured to be V1 and V2 volts with incident light of wavelength λ and λ/2, respectively. The relation between V1 and V2 may be In an experiment of photoelectric effect the stopping potential was measured to be V1 and V2 volts with incident light of [...]
When a certain metal surface is illuminated with light of frequency v, the stopping potential for photoelectric current is V0. When the same surface is illuminated by light of frequency v/2, the stopping potential is V0/4. The threshold frequency for photoelectric emission is
29
Nov
When a certain metal surface is illuminated with light of frequency v, the stopping potential for photoelectric current is V0. When the same surface is illuminated by light of frequency v/2, the stopping potential is V0/4. The threshold frequency for photoelectric emission is the stopping potential for photoelectric current is V0. When the same surface [...]
One milliwatt of light of wavelength 4560 A is incident on a cesium surface of work function 1.9 ev. Given that quantum efficiency of photoelectric emission is 0.5 %. Planck’s constant h = 6.62 × 10^-34 J-s and velocity of light c = 3 × 10^8 ms^-1.
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Nov
One milliwatt of light of wavelength 4560 A is incident on a cesium surface of work function 1.9 ev. Given that quantum efficiency of photoelectric emission is 0.5 %. Planck’s constant h = 6.62 × 10^-34 J-s and velocity of light c = 3 × 10^8 ms^-1. Ultraviolet beam of wavelength 280 nm is incident [...]
In a photoelectric experiment, the graph of frequency υ of incident light (in Hz) and stopping potential V (in V) is as shown in the figure. From figure, the value of the Planck’s constant is (e is the elementary charge)
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Nov
In a photoelectric experiment, the graph of frequency υ of incident light (in Hz) and stopping potential V (in V) is as shown in the figure. From figure, the value of the Planck’s constant is (e is the elementary charge) In a photoelectric experiment the graph of frequency υ of incident light (in Hz) and [...]
A metallic surface is irradiated by a monochromatic light of frequency υ1 and stopping potential is found to be V1 If the light of frequency υ2 irradiates the surface, the stopping potential will be
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Nov
A metallic surface is irradiated by a monochromatic light of frequency υ1 and stopping potential is found to be V1 If the light of frequency υ2 irradiates the surface, the stopping potential will be A metallic surface is irradiated by a monochromatic light of frequency υ1 and stopping potential is found to be V1 If [...]
Ultraviolet beam of wavelength 280 nm is incident on lithium surface of work function 2.5 eV. The maximum velocity of electron emitted from metal surface is
29
Nov
Ultraviolet beam of wavelength 280 nm is incident on lithium surface of work function 2.5 eV. The maximum velocity of electron emitted from metal surface is Ultraviolet beam of wavelength 280 nm is incident on lithium surface of work function 2.5 eV. The maximum velocity of electron emitted from metal surface is November 29, 2020 [...]