Home
Class 12
PHYSICS
A light of wavelength 500 nm is incident...

A light of wavelength 500 nm is incident on a sensitive plate of photoelectric work function 1.235 eV. The kinetic energy of the photo electrons emitted is be (Take h = `6.6 xx 10^(-34)` Js)

A

0.58 eV

B

2.48 eV

C

1.24 eV

D

1.16 eV

Text Solution

Verified by Experts

The correct Answer is:
C
`KE_(max) = (hc)/(lambda) - phi`
`= ((6.6 xx 10^(-34) xx 3 xx 10^(8))/(500 xx 10^(-9) xx 1.6 xx 10^(-19))) - 1.235`
= (2.48 - 1.235)eV = 1.245 eV
Promotional Banner

Topper's Solved these Questions

  • DUAL NATURE OF RADIATION AND MATTER

    FULL MARKS|Exercise TEXTUAL EVALUATION SOLVED -( SHORT ANSWER QUESTIONS)|14 Videos

  • DUAL NATURE OF RADIATION AND MATTER

    FULL MARKS|Exercise TEXTUAL EVALUATION SOLVED -( LONG ANSWER QUESTIONS)|13 Videos

  • DUAL NATURE OF RADIATION AND MATTER

    FULL MARKS|Exercise ADDITIONAL QUESTIONS -( ADDITIONAL NUMERICAL PROBLEMS : )|10 Videos

  • CURRENT ELECTRICITY

    FULL MARKS|Exercise Additional Questions Solved (Numerical Problems)|6 Videos

  • ELECTROSTATICS

    FULL MARKS|Exercise ADDITIONAL QUESTIONS SOLVED ( VII. NUMERICAL PROBLEMS )|5 Videos

Similar Questions

Explore conceptually related problems

A light of wavelength 500nm is incident on a sensitive plate of photoelectric work function 1.235 eV. The kinetic energy of the photo electrons emitted is be ( Take h = 6.6 xx 10^(-34)Js)

Light of wavelength 5000Å falls on a sensitive plate with photoelectric work function of 1.9 eV. The K.E. of the photo electron emitted will be

If a light of wavelength 330 nm is incident on a metal with work function 3.55 eV, the electrons are emitted. Then the wavelength of the emitted electron is (Take h = 6.6 xx 10^(-34) Js)………………………

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 :

If a light of wavelength 330nm is incident on a metal with word function 3.55eV, the electrons are emitted. Then the wavelength of the emitted electron is ( Taken h = 6.6 xx 10^(-34) Js)