A beam of electromagnetic radiation of intensity `12.8 xx 10^(-5) W//cm^(2)` is comprised of wavelength, `lambda = 155 nm` . It falls normally on a metal (work function `phi = 2eV`) of surfacce area of the ` 1 cm^(2)`. If one in `10^(3)` photons ejects total number of electrons ejected in 1 s in `10^(x)`. (hc = 1240 eVnm) `1eV = 1.6 xx 10^(-19)`J =, then x is _____.

A beam of electromagnetic radiation intensity 6.4xx10^(-5)W//cm^(2) is comprised of wavelength , lambda =310 nm.It falls normally on metal (work function 2 eV) of surface are 1 cm^(2) .If one in 10^(3) photons ejects an electron ,total number of electrons ejected in 1 s is 10^x [hc=1240 eV-nm ,1 eV= 1.6xx10^(-19)J ],the value of x is....

A beam of electromagnetic radiation comprised of wavelength 620 nm on a perfectly absorbing metal (work function, phi=2eV) surface of area 1cm^2 Pressure exerted by the radiation on the surface is 3xx2^(-13)N//cm^3 . If one in 3xx10^3 photons ejects an electron, and total number of electrons ejected in 1 is 1x , then x is _______ [Given : hc=1240 e Vnm, 1eV= 1.6xx10^(-19)J]

A beam of electromagnetic radiation comprised of wavelength 620 nm on a perfectly absorbing metal (work function, phi=2eV) surface of area 1cm^2 Pressure exerted by the radiation on the surface is 3xx2^(-13)N//cm^3 . If one in 3xx10^3 photons ejects an electron, and total number of electrons ejected in 1 is 10^x , then x is _______ [Given : hc=1240 e Vnm, 1eV= 1.6xx10^(-19)J]

Light of wavelength 350 nm falls on a metal having work function of 2eV. What is maximum possible magnitude of linear momentum of ejected electron ?

Work function of a metal is 2.3eV and on 1.0 cm^(2) area of that metal, a light of intensity 8.6 xx 10^(3) W.m^(-2) is incident. That intensity is distributed equally among the wavelength 4144 Å, 4972 Å and 6216 Å . If no ray is lost due to scattering and if each of the photons of proper energy can emit photoelectrons, what will be the number of photoelectrons emitted in 2 s? (h = 6.63 xx 10^(-34) J.s, 1eV = 1.6 xx 10^(-19)J)

Calcium plate has maximum possible radiation of wavelength 1 of 400 nm to eject electrons . It’s work function is

Out of the following options in which case in the velocity of electron greater than 1.5xx10^(6) m//s. {hc=1240 eV-nm}

A beam of light has two wavelengths 4,972Å and 6,216Å with a total intensity of 3.6xx10^(-3) W m^(-2) equally distributed among the two wavelengths . The beam falls normally on an area of 1 cm^2 of clean metallic surface of work function 2.3 eV . Assume that there is no loss of light by reflection and that each capable photon ejects one electron. The number of photoelectrons liberated in 2 s is approximately