The phenomenon of diffraction of light was discovered by-

Options

A. Young
B. Hertz
C. Girmaldi
D. Malus

Answer

To solve the question regarding who discovered the phenomenon of diffraction of light, we can follow these steps:

### Step-by-Step Solution:

1. **Understand the Concept of Diffraction**:
- Diffraction refers to the bending of light waves around obstacles or through openings (such as slits). This phenomenon occurs when light encounters an edge or a slit that is comparable in size to its wavelength.

2. **Identify the Key Historical Figure**:
- The question provides four options: Young, Herge, Grimaldi, and Malus. We need to determine which of these scientists is associated with the discovery of diffraction.

3. **Recall Historical Context**:
- The phenomenon of diffraction was notably studied by several scientists, but it was the Italian scientist Maria Grimaldi who first observed and documented the bending of light around edges in the year 1660.

4. **Select the Correct Answer**:
- Based on the historical information, we can conclude that the correct answer to the question is option C, Grimaldi.

### Final Answer:
The phenomenon of diffraction of light was discovered by **Maria Grimaldi** in the year **1660**.

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