JEE PYQ: Atomic Structure Question 28
Question 28 - 2020 (09 Jan Shift 1)
The de Broglie wavelength of an electron in the 4th Bohr orbit is:
(1). ($2\pi a_0$)
(2). ($4\pi a_0$)
(3). ($6\pi a_0$)
(4). ($8\pi a_0$)
Show Answer
Answer: (4)
Solution
$2\pi r = n\lambda$. $r = \frac{n^2 a_0}{Z} = 16a_0$. $\lambda = \frac{2\pi \times 16a_0}{4} = 8\pi a_0$.