Enter your answer in the provided box. the mathematical equation for studying the photoelectric effect is hν = w + 1 2 meu2 where ν is the frequency of light shining on the metal; w is the energy needed to remove an electron from the metal; and me and u are the mass and speed of the ejected electron, respectively. in an experiment, a student found that a maximum wavelength of 351 nm is needed to just dislodge electrons from a metal surface. calculate the velocity (in m/s) of an ejected electron when the student employed light with a wavelength of 303 nm.

Explanation:

By Einstein's Equation of photoelectric effect we know that

here we know that

= energy of the photons incident on the metal

= minimum energy required to remove photons from metal

= kinetic energy of the electrons ejected out of the plate

now we know that it requires 351 nm wavelength of photons to just eject out the electrons

so we can say

here we know that

now we have

now by energy equation above when photon of 303 nm incident on the surface

the answer is d. 4

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