The main difference in diffraction and inteference is

Options

A. Diffraction is due to interaction of light from the same wave front whereas interference is the interaction of waves from two isolated sources
B. Diffraction is due to interaction of light from same wavefront, whereas the interference is the interaction of two waves derived from the same source.
C. Diffraction is due to interaction of waves derived from the same source . Whereas the interference is the bending of light from the same wavefront
D. Diffraction is caused by reflected waves from a source whereas interference is caused due to refraction of waves from a surface

Answer

To solve the question regarding the main difference between diffraction and interference, we can follow these steps:

### Step-by-Step Solution:

1. **Define Diffraction**:
- Diffraction refers to the bending of light waves around obstacles or through apertures. It occurs when a wave encounters an obstacle or a slit that is comparable in size to its wavelength. This phenomenon results in the spreading of waves.

2. **Define Interference**:
- Interference is the phenomenon that occurs when two or more waves overlap and combine to form a new wave pattern. This can happen when waves from different sources meet and either reinforce (constructive interference) or cancel each other out (destructive interference).

3. **Identify the Sources of Waves**:
- In diffraction, the wavelets are generated from different parts of the same wavefront. This means that a single wavefront can produce multiple wavelets that interfere with each other.
- In contrast, interference typically involves two distinct wave sources. These sources produce separate wavefronts that can interact with each other.

4. **Summarize the Key Difference**:
- The main difference between diffraction and interference lies in the origin of the waves involved. Diffraction involves wavelets from a single wavefront, while interference involves waves from two separate sources.

5. **Select the Correct Option**:
- Based on the definitions and explanations, we can conclude that the correct option that highlights the main difference between diffraction and interference is the one that states this distinction clearly.