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Ultraviolet light of wavelength 2271 Å f...

Ultraviolet light of wavelength 2271 Å from a 100 W mercury source irradiates a photo-cell made of molybdenum metal. If the stopping potential is –1.3 V, estimate the work function of the metal. How would the photo-cell respond to a high intensity (`~105 W m^(–2)`) red light of wavelength 6328 Å produced by a He-Ne laser?

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