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# the work function for a certain metal is 4.2 ev. will this metal give photoelectric emission for incident radiation of wavelength 330 nm?

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### Mohammed

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## The work function for a certain metal is 4.2 eV. Will this metal give photoelectric emission for incident radiation of wavelength 330 nm ?

The work function for a certain metal is 4.2 eV. Will this metal give photoelectric emission for incident radiation of wavelength 330 nm ?

Hertz's Observations

The work func... Question

The work function for a certain metal is 4.2 eV. Will this metal give photoelectric emission for incident radiation of wavelength 330 nm?

Open in App Solution No

Work function of the metal,

Charge on an electron, = 1.6 × 10−19 C

Planck’s constant, = 6.626 × 10−34 Js

Wavelength of the incident radiation, = 330 nm = 330 × 10−9 m

Speed of light, = 3 × 108 m/s

The energy of the incident photon is given as:

It can be observed that the energy of the incident radiation is less than the work function of the metal. Hence, no photoelectric emission will take place.

Suggest Corrections 5

SIMILAR QUESTIONS

Q. If the threshold wavelength

( λ o ) of a metal is 330 nm

, then the work function for the photoelectric emission is:

Q. The work function of a metal is 1eV. On making light of wavelength

3000 ˚ A

incident on this metal, the velocity of photoelectrons emitted from it for photoelectric emission will be

Q. The threshold wavelength for the ejection of electron from metal X Is 330 nm. The work function for photoelectric emission from metal X isQ. If the threshold wavelength

( λ o ) of a metal is 330 nm

, then the work function for the photoelectric emission is:

Q. The stopping potential for the photo electrons emitted from a metal surface of work function

1.7 e V is 10.4 V

. Identify the energy levels corresponding to the transitions in hydrogen atom which will result in emission of wavelength equal to that of incident radiation for the above photoelectric effect.

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## The work function for a certain metal is 4.2 eV. Will this metal give photoelectric emission for incident radiation of wavelength 330 nm?

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## The work function for a certain metal is 4.2 eV. Will this metal give photoelectric emission for incident radiation of wavelength 330 nm?

Medium Open in App

Updated on : 2022-09-05

Work function of the metal is 4.2 eV;

Solution Verified by Toppr Given: λ=330nm.

The energy of incident photon is given by,

E=hc/λ E= 330×10 −9 6.63×10 −34 ×3×10 8 ​ E=6×10 −19 J or 3.79eV

E is less than work function.

Hence, no photoelectric emission will take place.

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Mohammed 13 day ago

Guys, does anyone know the answer?