For the Bohr's first orbit of circumference \[2\pi r\], the de-Broglie – McqOptions

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1.	For the Bohr's first orbit of circumference \[2\pi r\], the de-Broglie wavelength of revolving electron will be [MP PMT 1987]
A.	\[2\pi r\]
B.	\[\pi r\]
C.	\[\frac{1}{2\pi r}\]
D.	\[\frac{1}{4\pi r}\]
Answer» B. \[\pi r\]

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