H2P-604

Energy levels and line spectra

H2 Physics · JC 2 · Hard · Energy levels and line spectra

Light of frequency

5.0\times10^{15}

Hz falls on a metal surface and the maximum kinetic energy of the emitted electrons is

1.6\times10^{-19}

J. The same surface is then illuminated with light of frequency

6.0\times10^{15}

Hz, giving maximum kinetic energy

3.2\times10^{-19}

J. Use these data to determine Planck's constant

h

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