WBJEE · Physics · Dual Nature of Matter
The de-Broglie wavelength of a moving bus with speed is \(v\) is \(\lambda\). Some passengers left the bus at a stoppage. Now when the bus moves with twice of its initial speed. Its kinetic energy is found to be twice of its value. What is the de-Broglie wavelength of the bus now?
- A \(\lambda\)
- B \(2 \lambda\)
- C \(\frac{\lambda}{2}\)
- D \(\frac{\lambda}{4}\)
Answer & Solution
Correct Answer
(A) \(\lambda\)
Step-by-step Solution
Detailed explanation
Initially \(\lambda=\frac{\mathrm{h}}{\sqrt{2 \mathrm{mE}}}\) Now acc. to question, \(\mathrm{V}^{\prime}=2 \mathrm{~V}, \quad \mathrm{E}^{\prime}=2 \mathrm{E}\)…
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