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 313 nm.

Explanation:

As we know that the maximum wavelength needed to remove the electron from metal surface is given as

so we have work function of metal is given as

Now as per Einstein's equation for photo electric effect we know that

answer: the correct answer is   air pressure at the top of mount everest is higher than at the bottom of the grand canyon.

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explanation: