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Hertz's Observations

A monochromat...

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A monochromatic light of wavelength x is incident on an isolated metallic sphere of radius a. The threshold wavelength is x1 which is larger than x. Find the number of photoelectrons emitted before the emission of photoelectrons stop.

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Q. When a light of photons of energy

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\frac{1}{4 π ε_{0}} = 9 \times 10^{9} N m^{2} / C^{2}

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