A photon of energy $3eV$ is incident on a metal surface having a work function of $2eV$. If the photon is absorbed, the maximum velocity of the emitted photoelectron is approximately (mass of electron $m_e = 9.1 imes 10^{-31} kg$):

Work function of a metal is $2.51\;eV.$ Its threshold frequency

The frequency of a photon having energy 100eV is

(Take $h = 6.67 imes {10^{ - 34}}$ Js, $1$ eV =$1.6 imes {10^{ - 19}}$ J)

A photon in motion has a mass equal to

An electron initially at rest is accelerated through a potential difference of 1V. The energy acquired by electron is

If the frequency of light incident on metal surface is doubled, then kinetic energy of emitted electron wii become

Ultraviolet light of wavelength 300 nm and intensity 1.0 ${\rm{W}}{{\rm{m}}^{ - 2}}$ falls on the surface of a photosensitive material. If one percent of the incident photons produce photoelectrons, then the number of photoelectrons emitted from an area of 1.0 ${\rm{c}}{{\rm{m}}^2}$ of the surface is nearly

The work function of metal is $1\;eV.$ Light of wavelength $3000\;\mathop A\limits^ \circ$ is incident on this metal surface. The velocity of emitted photo-electrons will be

A light whose frequency is equal to $6 imes {10^{14}}{\rm{Hz}}$ is incident on a metal whose work function is 2eV. $\left[ {h = 6.63 imes {{10}^{ - 34}}\;Js,\;1eV = 1.6 imes {{10}^{ - 19}}\;J} \right].$ The maximum energy of the electrons emitted will be

The wavelength of the photoelectric threshold for silver is ${\lambda _0}.$ The energy of the electron ejected from the surface of silver by an incident light of wavelength $\lambda (\lambda < {\lambda _0})$ will be

Dual nature of radiation is shown by