Question

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 the first orbit
• C. equal to twice the circumference of the first orbit
• D. equal to the circumference of the first orbit

Answer 1

Answer: (D)

equal to the circumference of the first orbit

Answer 2

Circumference = $n\lambda = 1 \lambda$