In Lenard's photoelectric experiment, which observation definitively proves the particle nature of light?
The kinetic energy of photoelectrons increases with increasing light intensity.
The number of photoelectrons emitted increases with increasing light intensity.
Existence of a threshold frequency below which no photoelectrons are emitted, regardless of intensity
The stopping potential is independent of the intensity of light.
Related Questions
Due to S.C.R. in vacuum tube
Decrease
Increase
{V_p} = Increase
Increase
Particle nature and wave nature of electromagnetic waves and electrons can be shown by
Electron has small mass, deflected by the metal sheet
-ray is diffracted, reflected by thick metal sheet
Light is reflected and defracted
Photoelectricity and electron microscopy
The number of photo-electrons emitted per second from a metal surface increases when
The energy of incident photons increases
The frequency of incident light increases
The wavelength of the incident light increases
The intensity of the incident light increases
A metal surface is illuminated by a light of given intensity and frequency to cause photoemission. If the intensity of illumination is reduced to one-fourth of its original value, then the maximum kinetic energy of the emitted photoelectrons would become
Four times the original value
Twice the original value
1/6th of the original value
unchanged
If the work function of a photometal is Its threshold wavelength will be
1200\mathop A\limits^ \circ
Cathode rays are
Positive rays
Neutral rays
He rays
Electron waves
Air becomes conducting when the pressure ranges between
1 - 10 atm
0.001 - 0.1 atm
10 - 100 atm
0.1 - 1 atm
Work function of a metal is Which of the waves of the following wavelengths will be able to emit photoelectrons from its surface
700 nm
600 nm
590 nm
650 nm
When yellow light is incident on a surface, no electrons are emitted while green light can emit. If red light is incident on the surface, then
No electrons are emitted
Photons are emitted
Electrons of higher energy are emitted
Electrons of lower energy are emitted
If the frequency of incident light in Lenard's experiment is doubled, keeping the intensity constant, what will happen to the number of photoelectrons emitted per second?
Doubles
Halves
May increase or remain same
Becomes zero
