NEET 2022 Physics de Broglie Wavelength MCQ Question

Chapter: Dual Nature of Radiation and Matter Class: 12 Physics — Chapter 11 Topic: de Broglie Wavelength Difficulty: 🟡 Medium

✅ Ans: 2 — Option B

The de Broglie relation is:

$$\lambda=\frac{h}{p}$$

Since $h$ is constant:

$$\lambda\propto\frac{1}{p}$$

So, as momentum $p$ increases, wavelength $\lambda$ decreases inversely.

Therefore, the graph must be a decreasing rectangular hyperbola.

$$\boxed{\text{Answer = 2 (B)}}$$

The screenshot's green tick on A is incorrect; the NEET 2022 solution identifies the inverse-curve graph as the correct one. (v4edu.in)

🧠 NEET Trick:

$$\boxed{\lambda\propto1/p\Rightarrow\text{decreasing hyperbola}}$$