Which of the following is matched wrongly?

Options

A. oil drop experiment ` rarr ` millikan
B. dual nature of light ` rarr` de Brogile
C. uncertainty principle `rarr ` Heisenberg
D. none of these

Answer

To solve the question of which of the following is matched wrongly, we will analyze each option provided.

### Step-by-Step Solution:

1. **Option A: Oil Drop Experiment**
- The oil drop experiment is indeed associated with Robert Millikan. This experiment was crucial in determining the charge of the electron.
- **Conclusion**: Option A is correct.

2. **Option B: Dual Nature of Light**
- The dual nature of light, which describes light as both a wave and a particle, is primarily attributed to Albert Einstein, who explained the photoelectric effect using this concept. However, the de Broglie wavelength equation (λ = h/p) relates to the wave-particle duality of matter, which is attributed to Louis de Broglie.
- **Conclusion**: Option B is also correct, as it correctly attributes the concept of wave-particle duality to de Broglie.

3. **Option C: Uncertainty Principle**
- The uncertainty principle is indeed associated with Werner Heisenberg. It states that the product of the uncertainties in position (Δx) and momentum (Δp) of a particle is greater than or equal to a constant (h/4π).
- **Conclusion**: Option C is correct.

4. **Option D: None of the Above**
- Since options A, B, and C are all correctly matched with their respective scientists, option D, which states that none of the above are matched wrongly, is the correct answer.
- **Conclusion**: Option D is the right answer.

### Final Answer:
The answer is **Option D: None of the above**.

---