Two different metals, M1 and M2, have work functions $\phi_1$ and $\phi_2$ respectively, where $\phi_1 > \phi_2$. If both metals are illuminated with light of the same frequency $

u$, such that$

u > \frac{\phi_1}{h}$, which metal will exhibit a larger stopping potential?

The stopping potential for photoelectrons emitted from a metal surface illuminated by light of frequency $

u$is$V$. When the frequency of the incident light is reduced to$\frac{

u}{2}$, the stopping potential becomes$\frac{V}{3}$. What is the threshold frequency?

Electrons ejected from the surface of a metal, when light of certain frequency is incident on it, are stopped fully by a retarding potential of 3 V. Photoelectric effect in this metallic surface begins at a frequency $6 imes {10^{14}}\;{{\rm{s}}^{ - 1}}$. The frequency of the incident light in ${{\rm{s}}^{ - 1}}$ is

[Planck’s constant = $6.4 imes {10^{ - 34}}\;{\rm{Js}},$ charge on the electron = $1.6 imes {10^{ - 19}}$C]

When the speed of electrons increase, then the value of its specific charge

If light of wavelength ${\lambda _1}$ is allowed to fall on a metal, then kinetic energy of photoelectrons emitted is ${E_1}.$ If wavelength of light changes to ${\lambda _2}$ then kinetic energy of electrons changes to ${E_2}.$ Then work function of the metal is

Dual nature of radiation is shown by

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

Monochromatic radiation emitted when electron on hydrogen atom jumps from first excited to the ground state irradiates a photosensitive material. The stopping potential is measured to be $3.57\;V.$ the threshold frequency of the material is

If wavelength of photon and electron is same then ratio of total energy of electron to total energy of photon would be

The work function of a metal is 4.5 eV. What is the threshold frequency for photoelectric emission? ($h = 6.63 imes 10^{-34}$ Js)

Two identical metal plates shown photoelectric effect by a light of wavelength $\lambda \mathop A\limits^ \circ$ falls on plate A and ${\lambda _B}$ on plate $B\left( {{\lambda _A} = 2{\lambda _B}} \right).$ The maximum kinetic energy is