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###### A photo sensitive material would emit electrons, if excited by photons beyond a threshold. To overcome the threshold, one would increase(a) the voltage applied to the light source(b) the intensity of light(c) the wavelength of light(d) the frequency of light

A photo sensitive material would emit electrons, if excited by photons beyond a threshold. To overcome the threshold, one would increase (a) the voltage applied to the light source (b) the intensity of light (c) the wavelength of light (d) the frequency of light

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