Which property of light is defined by the state ment “Light travels in the straight line"?

Options

A. Straight propagation of light
B. Rectilinear propagation of light
C. Unidirectional propagation of light
D. Linear propagation of light

Answer

**Step-by-Step Solution:**

1. **Understanding the Statement**: The statement "Light travels in a straight line" describes a fundamental behavior of light. This behavior is crucial in understanding how light interacts with objects and how it can be manipulated in various applications.

2. **Identifying the Property**: The property of light that corresponds to this behavior is known as "rectilinear propagation." This term refers to the tendency of light (and other electromagnetic waves) to move in straight paths unless acted upon by an external force or medium.

3. **Relating to Wave Theory**: Light can be understood through different theories, including wave theory. In this context, light is considered an electromagnetic wave, which also exhibits the property of traveling in straight lines.

4. **Conclusion**: Therefore, the property of light defined by the statement "Light travels in a straight line" is called "rectilinear propagation of light."

**Final Answer**: Rectilinear propagation of light.

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