**Reflection of Light by Wave Theory**

**Introduction**
The reflection of light is the phenomenon of bouncing back of light waves from a surface. It occurs when light waves encounter a boundary between two different media and are redirected. The wave theory of light explains this phenomenon based on the behavior of light as a wave.

**Wave Theory of Light**
According to the wave theory of light, light is considered as an electromagnetic wave. These waves consist of electric and magnetic fields oscillating perpendicular to each other and to the direction of wave propagation. When a light wave encounters a surface, such as a mirror or any other reflective object, it undergoes reflection.

**Law of Reflection**
The law of reflection states that the angle of incidence is equal to the angle of reflection. This means that the incoming light wave and the reflected light wave make equal angles with the normal, a line perpendicular to the surface of reflection. This law holds true for all types of surfaces, including smooth and rough surfaces.

**Process of Reflection**
The reflection of light can be explained in the following steps:

1. Incident Light: When a light wave approaches a surface, it is called the incident light. The incident light wave carries energy and is characterized by its wavelength, frequency, and amplitude.

2. Boundary Interaction: Upon reaching the boundary between two media, the incident light wave interacts with the atoms or molecules of the surface material. The electric and magnetic fields of the wave cause the charged particles in the material to vibrate, generating their own electromagnetic waves.

3. Reflected Light: The interaction between the incident light wave and the surface atoms/molecules results in the generation of a new wave known as the reflected light wave. This wave carries energy and is redirected away from the surface.

4. Angle of Incidence and Angle of Reflection: The angle at which the incident light wave strikes the surface is called the angle of incidence (θi), and the angle at which the reflected light wave bounces off the surface is called the angle of reflection (θr). According to the law of reflection, θi = θr.

**Conclusion**
The wave theory of light provides a comprehensive explanation of the reflection of light. It describes how light waves interact with the atoms or molecules of a surface, leading to the generation of reflected light waves. The law of reflection, which states that the angle of incidence is equal to the angle of reflection, holds true for all types of surfaces. Understanding the reflection of light is crucial in various fields, including optics and everyday applications such as mirrors and reflective surfaces.