Question

12. what is the wavelength of em radiation that ejects 2.00-ev electrons from calcium metal, given that the binding energy is 2.71 ev? what type of em radiation is this?

Answer 1

From the calculation, the wavelength of the waves is about 264 nm and belongs to the ultraviolet spectrum.

What is photoelectric effect?

The term photoelectric effect can be used to describe the loss of electron from the surface of a metal. Given that; KE = E - W, where;

KE = kinetic energy of the emitted photoelectron

E = energy of the photon

W = work function of the metal

$2= E - 2.71\\E = 2 + 2.71\\E = 4.71ev or 7.5 * 10^-19 J$

λ= hc/E

λ= $6.6 * 10^-34 * 3 * 10^8/7.5 * 10^-19$

λ= $2.64 * 10^-7 m$ or 264 nm

Learn more about wavelength:brainly.com/question/13533093

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