When a certain crystal is illuminated with an X-ray source of unknown wavelength, a first-order X-ray diffraction maximum is observed at an angle of 27.1∘∘. (All angles are measured relative to the Bragg plane.) When illuminated with a different source with a known wavelength 0.15 nm, a second-order maximum is detected at 40.5∘∘. Part (a) What is the distance, in nanometers, between the Bragg planes? Part (b) What is the wavelength, in nanometers, of the first, source?
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When a certain crystal is illuminated with an X-ray source of unknown wavelength, a first-order X-ray diffraction maximum is observed at an angle of 27.1∘∘. (All angles are measured relative to the Bragg plane.) When illuminated with a different source with a known wavelength 0.15 nm, a second-order maximum is detected at 40.5∘∘.
Part (a) What is the distance, in nanometers, between the Bragg planes?
Part (b) What is the wavelength, in nanometers, of the first, source?
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