Light of a given wavelength is used to illuminate the surfacce of a metal, however, no photoelectrons are emitted. In order to c

Question

3 years ago

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Light of a given wavelength is used to illuminate the surfacce of a metal, however, no photoelectrons are emitted. In order to c

ause electrons to be ejected from the surface of this metal you shouldA. use light of the same wavelength but increase its intensity.B. use light of a shorter wavelength.C. use light of the same wavelength but decrease its intensity.D. use light of a longer wavelength.

Physics

1 answer:

Jlenok [28] · Answer 1 · 2022-07-25T06:35:23+03:00

Answer:

B. use light of a shorter wavelength.

Explanation:

We know that

$E= \frac{hc}{\lambda}$

h= plank's constant

c= speed of light

λ= wavelength of the incident light

so, in order to have sufficient energy for for the emission of electron, the incident's radiation must have λ small enough.

B. use light of a shorter wavelength.