In an experiment to study the photo-electric effect, light of wavelength 400 nm shining on a metallic surface causes electrons to be emitted. The maximum kinetic energy of the electrons is 1.05 eV (electron volts). Another light source of wavelength 200 nm is then tried, and the emitted electrons have a maximum kinetic energy of 4.20 eV. Using this information: a) determine the value of Planck's constant. b) determine the work function of the metal.
In an experiment to study the photo-electric effect, light of wavelength 400 nm shining on a metallic surface causes electrons to be emitted. The maximum kinetic energy of the electrons is 1.05 eV (electron volts). Another light source of wavelength 200 nm is then tried, and the emitted electrons have a maximum kinetic energy of 4.20 eV. Using this information: a) determine the value of Planck's constant. b) determine the work function of the metal.
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Transcribed Image Text:In an experiment to study the photo-electric effect, light of wavelength 400 nm
shining on a metallic surface causes electrons to be emitted. The maximum kinetic
energy of the electrons is 1.05 eV (electron volts). Another light source of
wavelength 200 nm is then tried, and the emitted electrons have a maximum kinetic
energy of 4.20 eV. Using this information:
a) determine the value of Planck's constant.
b) determine the work function of the metal.
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