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In photoelectric effect of a certain metal the stopping potential is 0.71 V if the wavelength of incident radiation is 491 nm. Now the stopping potential comes out to be 1.43 V if the wavelength of incident radiation is:

(1) 390 nm

(2) 382 nm

(3) 275 nm

(4) 392 nm
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Dual nature of matter and radiation, Photons and photoelectric effect

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