Gujarati
11.Dual Nature of Radiation and matter
easy

The photo-electrons emitted from a surface of sodium metal are such that

A

They all are of the same frequency

B

They have the same kinetic energy

C

They have the same de Broglie wavelength

D

They have their speeds varying from zero to a certain maximum

Solution

(d) The photoelectric effect related with the incident light frequency ( $v$ ) by the following equation:

$E_{k}=e V_{s}=h \nu-\phi$

where $\phi$ is the work function of the material and $E_{k}$ is the kinetic energy of the photo electron. So the photoelectrons emitted from the surface of sodium metal are of speeds from zero to a certain maximum depending on the incident photon energy.

Standard 12
Physics

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