A normal drawn at the point of incidence makes an angle of ______ with its corre sponding opaque surface.

Options

A. `0^@`
B. `45^@`
C. `90^@`
D. `180^@`

Answer

**Step-by-Step Solution:**

1. **Understanding the Concept of Normal Line**:
- A normal line is an imaginary line that is drawn perpendicular to the surface at the point of incidence where light strikes the surface.

2. **Identifying the Angle**:
- The angle that the normal makes with the surface is crucial to understanding how light behaves when it hits a surface.

3. **Defining the Angle**:
- By definition, the normal line makes an angle of 90 degrees with the surface. This is because the normal is perpendicular to the surface.

4. **Conclusion**:
- Therefore, the angle that the normal drawn at the point of incidence makes with its corresponding opaque surface is **90 degrees**.

**Final Answer**: The angle is 90 degrees.

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