Home
Class 12
PHYSICS
A beam of electromagnetic radiation comp...

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]`

Promotional Banner

Similar Questions

Explore conceptually related problems

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 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 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 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 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 metal is irradiated with light of wavelength 600 nm. Given that the work function of the metal is 1.0 eV, the de Broglie wavelength of the ejected electron is close to:

when a beam of 10.6 eV photons of intensity 2.0 W//m^(2) falls on a platinum surface of area 1.0 xx 10^(4) m^(2) and work function 5.6 eV , 0.53 % of the incidentphotons eject photoelectrons find the number of photoelectrons emited per second and their minimum energies (in eV)Take 1 eV= 1.6 xx 10^(-19) J

A beam of light of wavelength 400nm and power 1.55 mW is directed at the cathode of a photoelectric cell. If only 10% of the incident photons effectively produce photoelectrons, then find current due to these electrons. (given hc=1240 eV-nm, e=1.6xx10^(-19)C )

A beam of light of wavelength 400nm and power 1.55 mW is directed at the cathode of a photoelectric cell. If only 10% of the incident photons effectively produce photoelectrons, then find current due to these electrons. (given hc=1240 eV-nm, e=1.6xx10^(-19)C )

When a beam of 10.6 eV photons of intensity 2.0 W //m^2 falls on a platinum surface of area 1.0xx10^(-4) m^2 and work function 5.6 eV, 0.53% of the incident photons eject photoelectrons. Find the number of photoelectrons emitted per second and their minimum and maximum energy (in eV). Take 1 eV = 1.6xx 10^(-19) J .