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I wanted to to know that why the attraction of electrons towards the positive plate of the the CRT is not taken into account in the Einstein’s explanation of the photoelectric effect and only the velocity imparted by the striking photon is considered.
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If light of wavelength lambda is incident on metal surface, the ejected fastest electron has speed v. If the wavelength is changed to 3/4(lambda), the speed of the fastest emitted electron will be?