If p is the momentum of the fastest electron ejected from a metal surface after the irradiation of light having wavelength i, then for 1.5 p momentum of the photoelectron, the wavelength of the light should be (assume kinetic energy of ejected photoelectron to be very high in comparison to work function):
A
`3/4lambda`
B
`1/2lambda`
C
`2/3lambda`
D
`4/9lamda`
Text Solution
Verified by Experts
The correct Answer is:
A
Topper's Solved these Questions
JEE MAINS
JEE MAINS PREVIOUS YEAR ENGLISH|Exercise QUESTION|1 Videos
JEE MAIN
JEE MAINS PREVIOUS YEAR ENGLISH|Exercise CHEMISTRY|146 Videos
JEE MAINS 2020
JEE MAINS PREVIOUS YEAR ENGLISH|Exercise CHEMSITRY|23 Videos
Similar Questions
Explore conceptually related problems
If p is the momentum of the fastest electron ejected from a metal surface after the irradiation of light having wavelength lamda , then for 1.5 p momentum of the photoelectron, the wavelength of the light should be ( 4 ) /(a) lamda . What is numerical value of a ? (Assume kinetic energy of ejected photoelectron to be very high in comparison to work function):
Light of wavelength 400 nm strikes a certain metal which has a photoelectric work function of 2.13eV. Find out the maximum kinetic energy of the photoelectrons
The work function for a metal is 4 eV. To eject the photo electrons with zero velocity the wavelength of the incident light should be
Light of wavelength 5000 Å falls on a sensitive plate with photoelectric work function of 1.9 eV . The kinetic energy of the photoelectron emitted will be
A light of wavelength 600 nm is incident on a metal surface. When light of wavelength 400 nm is incident, the maximum kinetic energy of the emitted photoelectrons is doubled. The work function of the metals is
Light of wavelength 2000Å is incident on a metal surface of work function 3.0 eV. Find the minimum and maximum kinetic energy of the photoelectrons.
When light of sufficiently high frequency is incident on a metallic surface, electrons are emitted from the metallic surface. This phenomenon is called photoelectric emission. Kinetic energy of the emitted photoelectrons depends on the wavelength of incident light and is independent of the intensity of light. Number of emitted photoelectrons depends on intensity. (hv-phi) is the maximum kinetic energy of emitted photoelectron (where phi is the work function of metallic surface). Reverse effect of photo emission produces X-ray. X-ray is not deflected by electric and magnetic fields. Wavelength of a continuous X-ray depends on potential difference across the tuve. Wavelength of charasteristic X-ray depends on the atomic number. Q. If potential difference across the tube is increased then
The work function of a metal is 3.4 eV. A light of wavelength 3000Å is incident on it. The maximum kinetic energy of the ejected electron will be :
Work function of a metal surface is phi=1.5eV . If a light of wavelength 5000Å falls on it then the maximum K.E. of ejected electron will be-
When light of sufficiently high frequency is incident on a metallic surface, electrons are emitted from the metallic surface. This phenomenon is called photoelectric emission. Kinetic energy of the emitted photoelectrons depends on the wavelength of incident light and is independent of the intensity of light. Number of emitted photoelectrons depends on intensity. (hv-phi) is the maximum kinetic energy of emitted photoelectron (where phi is the work function of metallic surface). Reverse effect of photo emission produces X-ray. X-ray is not deflected by electric and magnetic fields. Wavelength of a continuous X-ray depends on potential difference across the tuve. Wavelength of charasteristic X-ray depends on the atomic number. Q. If frequency (upsilongtupsilon_0) of incident light becomes n times the initial frequency (v), then KE of the emitted photoelectrons becomes ( v_0 threshold frequency).
JEE MAINS PREVIOUS YEAR ENGLISH-JEE MAINS-QUESTION
