Part 2
A and B are two metals with threshold frequencies 1.8×10^14Hz and 2.2×10^4Hz. Two identical photons of energy 0.825 eV each are incident on them. Then photoelectrons are emitted by (Take h = 6.6×10^−34J−s)
29
Nov
A and B are two metals with threshold frequencies 1.8×10^14Hz and 2.2×10^4Hz. Two identical photons of energy 0.825 eV each are incident on them. Then photoelectrons are emitted by (Take h = 6.6×10^−34J−s) If in a photoelectric cell the wavelength of incident light is changed from 4000 Å to 3000 Å then change in stopping [...]
Light rays of wavelengths 6000A ˚and of photon intensity 39.6 watts/m^2 incidents on a metal surface. If only 1% of photons incident on the surface emit photoelectrons, then the number of electrons emitted per second per unit area from the surface will be : [Planck constant h=6.64×10^−34 Js; Velocity of light =3×10^8 m/s ]
29
Nov
Light rays of wavelengths 6000A ˚and of photon intensity 39.6 watts/m^2 incidents on a metal surface. If only 1% of photons incident on the surface emit photoelectrons, then the number of electrons emitted per second per unit area from the surface will be : [Planck constant h=6.64×10^−34 Js; Velocity of light =3×10^8 m/s ] Light [...]
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Light rays of wavelengths 6000A ˚and of photon intensity 39.6 watts/m^2 incidents on a metal surface. If only 1% of photons incident on the surface emit photoelectrons ,
then the number of electrons emitted per second per unit area from the surface will be : [Planck constant h=6.64×10^−34 Js; Velocity of light =3×10^8 m/s ] ,
What retarding potential is necessary to stop the emission of photoelectrons, if the work function of the target material is 1.24 eV and wavelength of incident light is 436 nm? (Take hc=1240eVnm)
29
Nov
What retarding potential is necessary to stop the emission of photoelectrons, if the work function of the target material is 1.24 eV and wavelength of incident light is 436 nm? (Take hc=1240eVnm) if the work function of the target material is 1.24 eV and wavelength of incident light is 436 nm? (Take hc=1240eVnm) What retarding [...]
When the electromagnetic radiations of frequencies 4×10^15Hz and 6×10^15Hz fall on the same metal, in different experiments, the ratio of maximum kinetic energy of electrons liberated is 1 : 3. The threshold frequency for the metal is
29
Nov
When the electromagnetic radiations of frequencies 4×10^15Hz and 6×10^15Hz fall on the same metal, in different experiments, the ratio of maximum kinetic energy of electrons liberated is 1 : 3. The threshold frequency for the metal is in different experiments the ratio of maximum kinetic energy of electrons liberated is 1 : 3. The threshold [...]
If in a photoelectric cell, the wavelength of incident light is changed from 4000 Å to 3000 Å then change in stopping potential will be
29
Nov
If in a photoelectric cell, the wavelength of incident light is changed from 4000 Å to 3000 Å then change in stopping potential will be If in a photoelectric cell the wavelength of incident light is changed from 4000 Å to 3000 Å then change in stopping potential will be November 29, 2020 Category: Chapter [...]
The work function for tungsten and sodium are 4.5 eV and 2.3 eV respectively. If the threshold wavelength λ for sodium is 5460 A ˚, the value of λ for tungsten is
29
Nov
The work function for tungsten and sodium are 4.5 eV and 2.3 eV respectively. If the threshold wavelength λ for sodium is 5460 A ˚, the value of λ for tungsten is the value of λ for tungsten is The work function for tungsten and sodium are 4.5 eV and 2.3 eV respectively. If the [...]
Polarising angle for water is 53^o 4. If light is incident at this angle on water and reflected, the angle of refraction is :
11
Nov
Polarising angle for water is 53^o 4. If light is incident at this angle on water and reflected, the angle of refraction is : Polarising angle for water is 53^o 4. If light is incident at this angle on water and reflected the angle of refraction is November 11, 2020 Category: Chapter 10 - Wave [...]
If the polarizing angle of a piece of glass for green light is 54.74^∘, then the angle of minimum deviation for an equilateral prism made of same glass is : [Given:tan54.74^∘=1.414]
11
Nov
If the polarizing angle of a piece of glass for green light is 54.74^∘, then the angle of minimum deviation for an equilateral prism made of same glass is : [Given:tan54.74^∘=1.414] If the polarizing angle of a piece of glass for green light is 54.74^∘ then the angle of minimum deviation for an equilateral prism [...]
When a plane polarised light is passed through an analyser and analyser is rotated through 90 degree, the intensity of the emerging light.
11
Nov
When a plane polarised light is passed through an analyser and analyser is rotated through 90 degree, the intensity of the emerging light. the intensity of the emerging light. When a plane polarised light is passed through an analyser and analyser is rotated through 90 degree November 11, 2020 Category: Chapter 10 - Wave Optics [...]
A beam of light is incident at polarising angle θ on air-glass interface. If λaandλg are the wavelength of light in air and glass respectively then
11
Nov
A beam of light is incident at polarising angle θ on air-glass interface. If λaandλg are the wavelength of light in air and glass respectively then A beam of light is incident at polarising angle θ on air-glass interface. If λaandλg are the wavelength of light in air and glass respectively then November 11, 2020 [...]