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JEE Main 2020 (Online) 2nd September Evening Slot

Numerical

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The work function of sodium metal is
4.41 $$ \times $$ 10

^{–19}J. If photons of wavelength 300 nm are incident on the metal, the kinetic energy of the ejected electrons will be (h = 6.63 $$ \times $$ 10^{–34}J s; c = 3 $$ \times $$ 10^{8}m/s) ________ × 10^{–21}J.Your input ____

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