Wrong statement in connection with Davisson-Germer experiment is

Options

A. The inter-atomic distance in nickel crystal of the order of the de-broglie wavelength.
B. Electrons of constant energy are obtained by the electron gun
C. Nickel crystal acts as a three dimensional diffracting grating.
D. Davission-Germer experimental is an inteference experiment.

Answer

To determine the wrong statement in connection with the Davisson-Germer experiment, we will analyze the experiment's key features and the provided options.

### Step-by-Step Solution:

1. **Understanding the Davisson-Germer Experiment**:
- The experiment involved firing an electron beam from an electron gun onto a nickel crystal.
- According to classical mechanics, one would expect the electrons to scatter uniformly in all directions upon hitting the crystal.

2. **Observations Made**:
- Contrary to classical expectations, Davisson and Germer observed that electrons were detected in specific directions at certain energies, indicating a pattern rather than uniform scattering.
- This led to the conclusion that electrons exhibit wave-like behavior, which is described by the de Broglie wavelength.

3. **Analyzing the Options**:
- We need to evaluate the statements regarding the experiment to identify the incorrect one.
- The options typically include statements about the nature of the electron beam, the crystal structure, and the type of experiment.

4. **Identifying the Wrong Statement**:
- One of the options states that the Davisson-Germer experiment is an interference experiment.
- An interference experiment requires the interaction of two different waves or wave fronts to create an interference pattern.
- In the Davisson-Germer experiment, there is no interaction between two different waves; instead, it demonstrates the diffraction of electrons by a crystal lattice.

5. **Conclusion**:
- Therefore, the statement that the Davisson-Germer experiment is an interference experiment is incorrect. The correct answer is that this statement is the wrong one in connection with the experiment.

### Final Answer:
The wrong statement in connection with the Davisson-Germer experiment is: "Davisson-Germer experiment is an interference experiment."

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