[اللؤلؤه الورديه]

Mystery #2, “Photoelectric Effect”Solved by Einstein in 1905

Light has both:
wave nature
particle nature


Photon is a “particle” of light

hn = KE + BE
KE = hn - BE

KE is the kinetic energy of the ejected electron .
BE is the binding energy of the electron in the l .


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