Ultra-violet light of wavelength 200 nm from a source is incident on a metal surface. If the stopping potential is –2.5 V, (a) calculate the work function of the metal, and (b) How would the surface respond to a high intensity red light of wavelength 6328 Å produced by a laser?

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TextWork Function and Electron EmissionThreshold Frequency and Threshold WavelengthEinstein's Photoelectric EquationCBSE PYQ

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