Question

A steel ball of mass 1kg is moving with a velocity 1 m/s. Then its de-Broglie waves length is equal to

• A. h
• B. h / 2
• C. Zero
• D. 1 / h

Answer 1

Answer: (A)

h

Answer 2

By using $\lambda = \frac{h}{mv}$ ⇒ $\lambda = \frac{\lambda}{1 \times 1} = h.$