A metal surface is illuminated with light of frequency $2 imes 10^{15}$ Hz. The stopping potential for emitted photoelectrons is 6 V. What is the work function of the metal (in eV)? (Planck's constant $h = 6.63 imes 10^{-34}$ Js)

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

Light of wavelength $1824\;\mathop A\limits^ \circ ,$ incident on the surface of a metal, produces photo-electrons with maximum energy $5.3\;eV.$ When light of wavelength $1216\;\mathop A\limits^ \circ$ is used, the maximum energy of photoelectrons is $8.7\;eV.$ The work function of the metal surface is

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

What is the strength of transverse magnetic field required to bend all the photoelectrons within a circle of a radius 50 cm. When light of wavelength 3800 $\mathop A\limits^ \circ$ is incident on a barium emitter? (Given that work function of barium is $2.5\;{\rm{eV}};h = 6.63 imes {10^{ - 34}}$ J-s; $e = 1.6 imes {10^{ - 19}}$ C; $m = 9.1 imes {10^{ - 31}}$kg)

A metal surface of work function 1.07 eV is irradiated with light of wavelength 332 nm. The retarding potential required to stop the escape of photoelectrons is

The work function of a metal is $4.2\;eV,$ its threshold wavelength will be

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]

The threshold wavelength for photoelectric effect of a metal is $6500\;\mathop A\limits^ \circ .$ The work function of the metal is approximately

When a piece of metal is illuminated by a monochromatic light of wavelength $\lambda ,\;$ then stopping potential is $3{V_s}.$ When same surface is illuminated by light of wavelength $2\lambda$, then stopping potential becomes ${V_s}.$ The value of threshold wavelength for photoelectric emission will be

A light having wavelength 300 nm falls on a metal surface. Work function of metal is 2.54 eV. What is stopping potential?