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The work function for a metal for which ...

The work function for a metal for which threshold wavelength is `6.6xx10^(-5)m`, is

A

`1.875xx10^(-12)` eV

B

`2xx10^(-29)` eV

C

`3xx10^(-21)` Joules

D

`6.25xx10^(-21)` eV

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The correct Answer is:
C
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Define work function of a metal .

The threshold wavelength for the ejection of electron for metal X is 330 nm. The work function for photoelectric emission from metal X is (h=6.6xx10^(-34)Js)

Lithium has a work function of 2.3 eV. It is exposed to light of wavelength 4.8 xx 10^(-7) m. Find the maximum kinetic energy with which the electron leaves the surface. What is the longest wave length which can produce the photo electrons ? Data : W = 2.3 eV, h=6.626 xx 10^(-34)Js, e=1.6 xx 10^(-19) C. Longest wavelength = ? , Kinetic energy = ?

The kinetic energy of the electron emitted when light of frequency 3.5xx10^(15)Hz is made to strike on a metal surface havng threshold frequency 1.5xx10^(15)Hz is (h=6.6xx10^(-34)Js)

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