Calculate maximum wavelength for which just electron ejected where work function of metal is `6.63 xx 10 ^-19`

X-rays of wavelength 0.82Å fall on a metal plate. Find the wavelength associated with photoelectron emitted. Neglect work function of the metal. Given c=3xx10^8 m//s h=6.63xx10^(-34)Js.

The work function of a metal is 3.3 xx10^(-19)J . The maximum wavelength of th e photons required to eject photoelectrons from the metal is (Take h=6.6xx10^(-34)Js )

A radiation of 3300 Å falls on a metal to eject electrons with a maximum velocity of 0.4 xx10^6 m//s, the value of the work function of metal is nearly (h=6.6 xx10^-34J-s,m_e =9.1 xx10^-31 kg)

The maximum wavelength for which an em wave can ejected electrons form a platinum surface is 195 nm. When radiations with a wavelength of 131nm shines on the surface. What is the maximum speed of the ejected electrons? [Use h=6.63xx10^(-34)Js ] m_(e)=9.1xx10^(-31)kg .

White light consisting of wavelengths 380 nmlelambdale750 nm is incident on a lead surface. For which one of the following ranges of wavelengths will photoelectrons be emitted from the lead surface that has a work function W_(0) = 6.63 xx 10^(-19) J ?

The work function of a metal surface is 4.2 eV. The maximum wavelength which can eject electrons from this metal surface is

The work function of a metal is 3.45 eV. Calculate what should be the maximum wavelength of a photon that can eject photoelectrons from the metal ?

Light of wavelength 3000 Å falls on a metal surface having work function 2.3 eV. Calculate the maximum velocity of ejected electrons. (Planck's constant , h = 6.63 xx 10 ^( - 34 ) J.s. , velocity of light c = 3 xx10 ^( 8 ) m//s , mass of an electron = 9.1 xx 10 ^( -31 ) kg )