What is the name given to change of path of light without any change of medium ?

Explanation

**Step-by-Step Solution:**

1. **Understanding the Question**: The question asks for the name of the phenomenon where light changes its path without changing the medium.

2. **Identifying the Phenomenon**: When light travels in a straight line and encounters a surface, it can change direction. This change in direction occurs without any change in the medium through which the light is traveling.

3. **Reflection of Light**: The primary phenomenon that describes this change in path of light is called "reflection." When light hits a surface, it bounces back, changing its direction while remaining in the same medium.

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