STATEMENT-`1` Hollow prism forms no spectra as a solid equilateral prism of glass.
`STATEMENT 2` Neglecting the thickness of hollow glass surface.The media is same .So dispersion is not to take place.

Options

A. Statement-I is true , Statement -II is true, Statement-II is correct explanation for Statement-I.
B. Statement - I is true, Statement -II is true: Statement -II is NOT a correct explanation for statement -I .
C. Statement-I is true, Statement-II is false.
D. statement-I is false, statement- II is true.

Answer

To analyze the statements given in the question regarding the hollow prism and its ability to form spectra, we can break down the reasoning step by step.

### Step-by-Step Solution:

1. **Understanding the Hollow Prism**:
- A hollow prism is essentially a prism that has an empty space inside it, typically filled with air. In this case, we are considering a hollow prism made of glass, where both the inside and outside of the prism are air.

2. **Light Incident on the Prism**:
- When light enters the hollow prism, it first encounters the surface of the prism. Since the medium outside (air) and the medium inside (also air) are the same, the behavior of light will be similar to that of a flat surface rather than a prism.

3. **Refraction in a Hollow Prism**:
- In a solid prism, light refracts at the boundaries due to the change in medium (air to glass). However, in a hollow prism, since both sides are air, the light will not experience a significant change in speed or direction. The light will only be slightly refracted at the surface, but this refraction is minimal due to the negligible thickness of the hollow prism.

4. **Dispersion of Light**:
- Dispersion occurs when light passes through a medium that has different refractive indices for different wavelengths (colors). In a solid glass prism, different colors of light are refracted by different amounts because glass has a varying refractive index for different wavelengths. In contrast, in the hollow prism, since both the inside and outside are air, there is no dispersion.

5. **Conclusion**:
- Therefore, the hollow prism does not form a spectrum like a solid glass prism does. The assertion that a hollow prism forms no spectra is true. The reason provided, which states that neglecting the thickness of the hollow glass surface means the media is the same and thus dispersion does not take place, is also true.

6. **Final Evaluation**:
- Both the assertion and the reason are true, and the reason correctly explains the assertion.

### Final Answer:
- **Assertion**: True - A hollow prism forms no spectra as a solid equilateral prism of glass.
- **Reason**: True - Neglecting the thickness of the hollow glass surface, the media is the same, so dispersion does not take place.