If I write photoelectric effect equation to nhv = 1/2mv(adsbygoogle = window.adsbygoogle || []).push({}); ^{2}+ W with n = 1,

I am puzzled whether the n is larger than 1, such as 2 or 3, for which I will get the two- or three- photon absorption.

Could you give me some comments on these question?

Best regards.

sandf

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# Question about photoelectric effect equation

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