23.Radiation from hydrogen gas excited to first excited state is used for illuminating certain metallic plate. When
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23.Radiation from hydrogen gas excited to first excited state is used for
illuminating certain metallic plate. When the same plate is exposed to the radiation from some unknown hydrogen like gas excited to the same level
it is found that de-Broglie wavelength of fastest photoelectron has
decreased by 2.3 times. It is given that energy corresponding to longest
wavelength of Lyman series of the unknown gas is 3 times the ionization
energy of hydrogen gas (13.6????????). The work function (in ????????) of the
metallic plate is [???????????????? (2.3)2 = 5.25]
Related Book For
Modern Classical Physics Optics Fluids Plasmas Elasticity Relativity And Statistical Physics
ISBN: 9780691159027
1st Edition
Authors: Kip S. Thorne, Roger D. Blandford
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