Dual Nature of ...

A metal surface of work function 1.07 eV is irradiated with light of wavelength 332 nm. The retarding potential required to stop the escape of photo-electrons is

When light falls on a metal surface, the maximum kinetic energy of the emitted photo-electrons depends upon

The electrons are emitted in the photoelectric effect from a metal surface

The work function of a metal is 4.2 eV, its threshold wavelength will be

The number of photo-electrons emitted per second from a metal surface increases when

The work function of metal is 1 eV. Light of wavelength 3000 Å is incident on this metal surface. The velocity of emitted photo-electrons will be

Energy from the sun is received on earth at the rate of 2 cal per cm² per min. If average wavelength of solar light be taken at 5500 Å then how many photons are received on the earth per cm² per min?
(h = 6.6 × 10^–34 J-s, 1 cal = 4.2 J)

The work function of a metallic surface is 5.01 eV. The photo-electrons are emitted when light of wavelength 2000 A falls on it. The potential difference applied to stop the fastest photo-electrons is
[h = 4.14 × 10^–15 eV sec]

A photon of energy E ejects a photo electron from a metal surface whose work function is W₀. If this electron enters into a uniform magnetic field of induction B in a direction perpendicular to the field and describes a circular path of radius r, then the radius r, is given by, (in the usual notation)

Photoelectric effect was first successfully explained by