When light of wavelength 380 nm falls on a cesium, Physics

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When light of wavelength 380 nm falls on a cesium

When light of wavelength 380 nm falls on a cesium surface,electrons are emitted that have a maximum kinetic energy of 1.13eV.

a) Find the work function of cesium.
b) Find the cutoff wavelength.
c) Find the frequency corresponding to the cutoff wavelength.

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Physics: When light of wavelength 380 nm falls on a cesium

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