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In 1887, Dr. Heinrich Hertz (an experimental physicist) observedthat shining a beam of ultraviolet light onto different metalplates caused the metals to spark. Different metalsrequired different minimum energies of light to cause them tospark. Increasing the intensity of light produced moreelectrons without increasing their energy. However,increasing the frequency of light produced electrons with higherenergies, but did not increase the number of electronsproduced. This phenomenon is known as the photoelectriceffect.
In 1905, Dr. Albert Einstein (a theoretical physicist) explainedthis phenomenon after reading a publication on black-body radiation(published in 1900) by Dr. Max Planck. Einstein explainedthat the photoelectric effect was a consequence of the wavebehavior of electrons. He received the 1921 Nobel Prize inphysics for explaining this phenomenon.
With Einstein's explanation that electrons behave as wave, whatwould be the wavelength of light emitted when an electron isejected from a silver (Ag) atom if the energy of the electron is7.56 x 10-19 J (Planck’s constant is 6.626 x10-34 kg m2/s and the velocity of lightis 2.998 x 108 m/s).
Group of answer choices
263 nm
526 nm
756 nm
22.7 nm
725 nm