Dual Nature of ...

Work function of a metal is the

Photon has a charge of

The work function of a photoelectric material is 3.32 eV. The threshold frequency will be equal to

Energy of a photon of green light of wavelength 5500m  is (given: h = 6.62 ×10⁻³⁴Js⁻¹) approximately

Uniform electric and magnetic fields are produced pointing in the same direction. An electron is projected pointing in the same direction, then

In which case is electron emission from a metal not known?

Photons can be

Given h = 6.6 ×10⁻³⁴ joule sec, the momentum of each photon in a given radiation is 3.3 ×10⁻²⁹ kg metre/sec. The frequency of radiation is

If the work function of a material is 2eV, then minimum frequency of light required to emit photo-electrons is 

In Thomson’s method for finding specific charge of positive rays, the electric and magnetic fields are

Photoelectric effect is

In a photon-particle collision (such as photon-electron collision) the quantity which is not conserved is

The specific charge for positive rays is much less than that for cathode rays. This is because

Photoelectric effect is possible

Davisson Germer experiment proves that

If the voltage across the electrodes of a cathode ray tube is 500 volts then energy gained by the electrons is

If work function of a metal plate is negligible then the K.E.of the photoelectrons emitted when radiations of 1000 Â are incident on the metal surface is

The maximum kinetic energy of photoelectrons emitted from a surface when photons of energy 6 eV fall on it is 4 eV. The stopping potential is

In Photoelectric effect

A photon is

If maximum velocity with which an electron can be emitted from a photo cell is 3.75×10⁸cms⁻¹ then stopping potential is

In an experiment of photoelectric emission for incident light of 4000 Â, the stopping potential is 2V. If the wavelength of incident light is made 3000 Â, then stopping potential will be

In the above experimental set up for studying photoelectric effect, if keeping the frequency of the incident radiation and the accelerating potential fixed, the intensity of light is varied, then

Photo-electric effect can be explained only by assuming that light

Wavelength of light incident on a photo cell is 3000 Â, if stopping potential is 2.5 volts, then work function of the cathode of photo cell is

in photoelectric effect, the photoelectric current

In various experiments on photo electricity the stopping potential for a given frequency of the incident radiation

In order to increase the kinetic energy of ejected photoelectrons, there should be an increase in

Each photon has the same speed but different

Number of ejected photoelectrons increases with increase