light reflection and refraction N
Light and Its Fundamental Properties
- Light is defined as a form of energy that provides the sensation of vision.
- Common phenomena associated with light include:
- Image formation by mirrors.
- The twinkling of stars.
- The beautiful colors observed in a rainbow.
- The bending of light as it passes through a medium.
- Properties of Light:
- Retains a dual nature, acting as both a wave and a particle.
- It is an electromagnetic wave, meaning it does not require a material medium to travel.
- Light tends to travel in straight lines.
- Light casts shadows when obstructed.
- The speed of light is at its maximum in a vacuum, with a value of approximately 3×108ms−1.
- When light strikes a surface, three possible interactions may occur:
- Reflection
- Refraction
- Absorption
Reflection of Light
- Reflection is the phenomenon of light rays bouncing back into the same medium upon striking the surface of an object.
- During reflection, the path of the light rays changes, but the medium remains the same.
- Types of Reflection:
- Regular reflection.
- Irregular reflection (also known as Diffuse reflection).
- Terminology for Reflection on Plane Surfaces:
- Incident Ray: The ray of light that falls upon the mirror surface.
- Reflected Ray: The ray of light that is sent back by the mirror.
- Point of Incidence: The specific point where