Question

The speed of the electron in the first Bohr orbit of H-atom is - (C = speed of light)

• A. C
• B. C/13.6
• C. C/137
• D. 137 C

Answer 1

Answer: (C)

C/137

Answer 2

v = $\frac { \mathrm { C } } { 137 }$ $\left( \frac{Z}{n} \right)$

Z = 1, n = 1 Ž v = $\frac{C}{137}$