Home
Class 12
CHEMISTRY
A light of wavelength 3000 Å falls on a ...

A light of wavelength `3000 Å` falls on a metal surface. Ejected `e^(-)` is further accelerated by a potential difference of 2V, then final K.E of the `e^(-)` is found to be `8xx10^(-19)J`. If threshold energy for the metal surface is `'phi'eV`. Then find the numerical value of `8phi`

Text Solution

Verified by Experts

The correct Answer is:
`9.00`
Promotional Banner

Similar Questions

Explore conceptually related problems

Light of wavelenght 5000 Å fall on a metal surface of work function 1.9 eV Find a. The energy of photon

Light of wavelength 2000 Å falls on a metallic surface whose work function is 4.21 eV. Calculate the stopping potential

Light of wavelength 3000 Å falls on a sensitive surface. If the surface has received 10^-7 J of energy, then the number of photons falling on the surface area is

Light of wavelength 2000Å is incident on a metal surface of work function 3.0 eV. Find the minimum and maximum kinetic energy of the photoelectrons.

When light of wavelength λ is incident on a metal surface ,stopping potential is found to be V_circ . When light of wavelength nλ is in incident on the same metal surface ,stopping potential is found to be V_circ/(n+1) . The threshold wavelength of the metal is

Photons of wavelength 6556 A^@ falls on a metal surface. If ejected electrons with maximum K.E. moves in magnetic field of 3 xx 10^(-4) T in circular orbit of radius 10^(-2) m, then work function of metal surface is

When light of wavelength lambda is incident on a metal surface, stopping potential is found to be x. When light of wavelength n lambda is incident on the same metal surface, stopping potential is found to be (x)/(n+1) . Find the threshold wavelength of the metal.

Light of wavelength 4000Å is allowed to fall on a metal surface having work function 2 eV. The maximum velocity of the emitted electrons is (h=6.6xx10^(-34)Js)

When radiation of the wavelength lamda is incident on a metallic surface ,the stopping potential is 4.8 V. If the same surface is illuminated with radiation of double the wavelength ,then the stopping potential becomes 1.6 V.Then the threshold wavelength for the surface is

The maximum kinetic energy of the photoelectrons is found to be 6.63xx10^(-19)J , when the metal is irradiated with a radiation of frequency 2xx10^(15) Hz. The threshold frequency of the metal is about: