Which of the folloiwng is dichroic

Options

A. poly vinyl alcohol
B. quartz
C. calcite
D. diamond

Answer

The question asks which of the following is dichroic. However, the provided video transcript does not relate to the question about dichroic materials. Instead, it discusses a physics problem involving projectile motion on an incline.

To answer the question about dichroic materials, we will provide a step-by-step solution based on the general understanding of dichroism in optics.

### Step-by-Step Solution:

1. **Understanding Dichroism**:
- Dichroism is a property of certain materials that exhibit different colors when viewed from different angles or when viewed under different lighting conditions. This effect is typically observed in materials that have anisotropic optical properties.

2. **Identifying Dichroic Materials**:
- Common examples of dichroic materials include certain types of crystals (like tourmaline), some glasses, and specific dyes. These materials absorb light differently depending on the polarization and angle of the incoming light.

3. **Analyzing Options**:
- If the question provides multiple options, we would need to analyze each option to determine which one exhibits dichroic properties. Look for materials known for their dichroic nature.

4. **Conclusion**:
- After evaluating the options, the material that shows different colors or absorption characteristics based on the angle of observation or polarization of light is identified as dichroic.