Find out the number of waves made by a Bohr's electron in one complete revolution in its `3rd` orbit.

Explanation

No. of waves in any orbit `= ("Circumference of that orbit")/("Wavelength") = (2pi r)/(lamda) = (2pi r)/((h//mv)) = (2pi)/(h) (m v r) = (2pi)/(h) (nh)/(2pi) = n`
Thus, the number of waved in 3rd orbit = 3