STANDARDPhysics-Atomic Structure
STANDARD Physics Bohr Model MCQ Question
Type: MCQ-conceptual-Medium-Class 11
The de-Broglie wavelength of an electron in the first Bohr orbit is
A
equal to one-fourth the circumference of the first orbit
B
equal to half the circumference of first orbit
C
equal to twice the circumference of first orbit
D
equal to the circumference of the first orbit.
Correct Answer
Option D
Detailed Explanation
In the first Bohr orbit, the angular momentum is quantized as nh/2π. The de-Broglie wavelength λ is given by h/p, where p is the momentum. For the first orbit, n = 1, and the circumference is 2πr₁. Thus, λ = 2πr₁, which is the circumference of the first orbit.
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