JEE Main 20202 Sep, Evening shiftChemistryMediumAtomic Structure113× since 2002
The work function of sodium metal is
4.41 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 10^–34 J s;
c = 3 10⁸ m/s) ________ × 10^–21 J.