Show that the circumference of the Bohr orbit for the hydrogen atom is an integral multiple of the de Broglie wavelength associated with the electron revolving around the orbit.
a) Bohr's circumference is an integer multiple of de Broglie's wavelength.
b) Bohr's circumference is proportional to de Broglie's wavelength.
c) Bohr's circumference is half of de Broglie's wavelength.
d) Bohr's circumference is double of de Broglie's wavelength.
