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Ultraviolet light of wavelength 800 A an...

Ultraviolet light of wavelength `800 A` and `700 A` when allowed to fall on hydrogen atoms in their ground states is found to liberate electrons with kinetic energies `1.8eV` and `4.0eV`, respectively. Find the value of Planck's constant.

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The correct Answer is:
`6.27 xx 10^(-34) Js`
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SL ARORA-ELECTRONS AND PHOTONS-TYPE D : Problem For Self Practice
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