Home
Class 12
PHYSICS
The stopping potential for the photoelec...

The stopping potential for the photoelectrons emitted from a metal surface of work function 1.7 eV is 10.4 V. Find the wavelength of the radiation used. Also, identify the energy levels in hydrogen atom which will emit this wavelength.

A

The wavelength of light used is `1022 Å`

B

The wavelength of light used is `970.6 Å`

C

The light used is emitted by hydrogen gas sample which de-excites from `n = 3` to `n = 1`

D

The light used is emitted by hydrogen gas sample which de-excites from `n = 3` to `n = 1`

Text Solution

Verified by Experts

The correct Answer is:
A, C
`K_(max) = 10.4 eV , phi = 1.7 eV`
`E = 10.4 + 1.7 = 12.1 eV rArr n = 3 ` to `n = 1`
`12.1 = (1242.eVÅ)/(lambda)`
Promotional Banner

Topper's Solved these Questions

  • SIMPLE HARMONIC MOTION

    ALLEN|Exercise Exercise - 08|2 Videos

  • SIMPLE HARMONIC MOTION

    ALLEN|Exercise Exercise - 09|2 Videos

  • SIMPLE HARMONIC MOTION

    ALLEN|Exercise Exercise - 06|2 Videos

  • RACE

    ALLEN|Exercise Basic Maths (Wave Motion & Dopplers Effect) (Stationary waves & doppler effect, beats)|24 Videos

  • TEST PAPER

    ALLEN|Exercise PHYSICS|4 Videos

Similar Questions

Explore conceptually related problems

Five volt of stopping potential is needed for the photoelectrons emitted out of a surface of work function 2.2 eV by the radiation of wavelength

Will photoelectrons be emitted from a copper surface, of work function 4.4 eV , when illuminated by a visible light?

The work function of Cs is 2.14 ev find the wavelength of the incident light if the stopping potential is 0.6 V.

Find the retarding potential requred to stop the escape of photo electrons from the metal surface of work function 1.07 eV , which is irradiated with light of wavelength 332 mn

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 photo - electrons is

The kinetic energy of the most energetic photoelectrons emitted from a metal surface is doubled when the wavelength of the incident radiation is reduced from lamda_1 " to " lamda_2 The work function of the metal is

The maximum kinetic energy of photoelectrons emitted from a metal surface increses from 0.4 eV to 1.2 eV when the frequency of the incident radiation is increased by 40% . What is the work function (in eV) of the metal surface?

Light of wavelength 500 nm is incident on a metal with work function 2.28 eV . The de Broglie wavelength of the emitted electron is

Light of wavelength 500 nm is incident on a metal with work function 2.28 eV . The de Broglie wavelength of the emitted electron is

Find the wavelength present in the radiation emitted when hydrogen atoms emitted to n = 3 states return to their ground state.