MEDIUM
12th ICSE
IMPORTANT
Earn 100

The energy of a photon is 10 eV. Calculate rest mass and dynamic-mass of the photon.

Important Questions on Photoelectric Effect

MEDIUM
12th ICSE
IMPORTANT
A photon ejects an electron of negligible kinetic energy from a metal surface. If the threshold frequency for the surface be 4.6×1014 Hz, Calculate the energy of the incident photon in electron-volt.
MEDIUM
12th ICSE
IMPORTANT
A metal sheet has a negative charge of 11.2 nC1 nC=10-9 C. How many photons of ultraviolet light are required to completely discharge the sheet by photoelectron ejection? What minimum amount of energy must be absorbed by the sheet to effect this discharge? The threshold frequency of the metal is 4.5×1015 Hz.
MEDIUM
12th ICSE
IMPORTANT
Assuming the visible region of the spectrum to be from 4000 Ao to 7500 Ao, calculate the maximum work function in electron-volt of a photo-cathode that can emit electrons with visible light of any wavelength.
MEDIUM
12th ICSE
IMPORTANT
The work function for sodium is 2.28 eV. What is the minimum energy for a quantum of radiation to cause photoelectric emission from a sodium surface?
MEDIUM
12th ICSE
IMPORTANT
The work function for sodium is 2.28 eV. Calculate the wavelength of this radiation?
MEDIUM
12th ICSE
IMPORTANT
A metal has a threshold wavelength of 6000 Ao. Calculate the threshold frequency and the work function of the metal in eV.
MEDIUM
12th ICSE
IMPORTANT
Photoelectric threshold frequency of an alkali metal is 5.0×1014 Hz. Calculate the work function of this metal.
MEDIUM
12th ICSE
IMPORTANT
Calculate the threshold frequency of photon for photoelectric emission from a metal whose work function is 0.1 eV.