Which of the following colour of light undergoes the maximum deviation while passing through a glass prism?

Options

A. Red
B. Blue
C. Violet
D. Green

Answer

To determine which color of light undergoes the maximum deviation while passing through a glass prism, we can follow these steps:

### Step-by-Step Solution:

1. **Understanding White Light**:
White light is composed of multiple colors, which can be separated into a spectrum when passed through a prism. The colors include Violet, Indigo, Blue, Green, Yellow, Orange, and Red.

2. **Order of Colors**:
The order of colors from the shortest wavelength to the longest wavelength is:
- Violet
- Indigo
- Blue
- Green
- Yellow
- Orange
- Red

3. **Wavelength and Deviation Relationship**:
The deviation of light through a prism is influenced by the wavelength of the light. Shorter wavelengths (like Violet) are refracted more than longer wavelengths (like Red).

4. **Refractive Index**:
The refractive index (μ) of a medium is inversely proportional to the wavelength of light. This means that:
- Violet light has the highest refractive index (μ is maximum).
- Red light has the lowest refractive index (μ is minimum).

5. **Conclusion on Deviation**:
Since Violet light has the highest refractive index, it will experience the maximum deviation when passing through a prism. Conversely, Red light will experience the least deviation.

6. **Final Answer**:
Therefore, the color of light that undergoes the maximum deviation while passing through a glass prism is **Violet**.