when a metallic surface is illuminated with radiation of wavelength | Dofollow Social Bookmarking Sites 2016
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When a metallic surface is illuminated with radiation of wavelength , the stopping potential is V.Photoelectric equation can be written as,        ... (i)Now, when the same surface is illuminated with radiation of wavelength 2, the stopping potential is V/4. So, photoelectric equation can be written as,From equations (i) and (ii), we get

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