A metal having work function `4.41xx10^(-19) J` is sunjected to a light having wavelength 300nm, then maximum kinetic energy of the emitted photoelectron is `...........xx10^(-21)J`

Explanation

`phi=4.41xx10^(-19)J`
`d=300 nm`
`KE_("max")=(hc)/(lambda)-phi`
`=6.63xx10^(-34)3xx10^(8)`
`300xx10^(-9)-4.41xx10^(-19)`
`=6.63xx10^(-19)-4.41xx10^(-19)`
`=222xx10^(-21)`
`Ans 222`