When light is passed through a prismm when………colour shows maximum deviation.

Options

A. red
B. violet
C. yellow
D. green

Explanation

To determine which color of light shows maximum deviation when passed through a prism, we can follow these steps:

### Step-by-Step Solution:

1. **Understanding Refraction and Deviation**:
- When light passes through a prism, it bends due to refraction. The amount of bending (deviation) depends on the refractive index of the material and the wavelength of light.

2. **Refractive Index and Wavelength Relationship**:
- The refractive index (n) of a medium is inversely related to the wavelength (λ) of light. This means that shorter wavelengths (like violet) have a higher refractive index compared to longer wavelengths (like red).

3. **Identifying Colors and Their Refractive Indices**:
- In the visible spectrum, red light has the longest wavelength and thus the lowest refractive index. Conversely, violet light has the shortest wavelength and the highest refractive index.

4. **Deviation of Colors**:
- Since the deviation is greater for light with a higher refractive index, violet light, which has the highest refractive index, will experience the maximum deviation when passing through a prism.

5. **Conclusion**:
- Therefore, among the colors of light, violet shows the maximum deviation when passed through a prism.

### Final Answer:
The color that shows maximum deviation when light is passed through a prism is **violet**.