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When ultraviolet light with a wavelength of 400 nmfalls on a certain metal surface, the maximum...

When ultraviolet light with a wavelength of 400 nmfalls on a certain metal surface, the maximum kinetic energy of the emitted photoelectrons is 1.10 eV .

What is the maximum kinetic energy K0 of the photoelectrons when light of wavelength 350 nm falls on the same surface?

Use h = 6.63×10?34 J?s for Planck's constant and c = 3.00×108 m/s for the speed of light and express your answer in electron volts.

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Answer #1

For the given situation the expression for maximum kinetic energy of an ejected electron is,

Inserting the given values we can find the work function for this material,

Again using the formula 1, we can find the max kinetic energy for case 2 i.e. for wavelength of 350 nm.

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