We can see things around us when they emit light (luminous objects) Non-Luminous objects → can be seen when they reflect light from a luminous object into our eyes.
Important
Presence of light does not guarantee the reflection of light.
Ray
Light is represented as straight lines with arrows to indicate direction in which light travels. Each of these lines is known as light ray → bundle of many light rays forms light beam
Reflection
Refraction
Total Internal Reflection
Total Internal Reflection (Pure Only)
Converging Lenses
Real VS Virtual Images
- when image is formed by the intersection of light rays → it can be seen by placing a screen at the image plane
- Example: image formed on a screen by a video projector
- such as image is real
In contrast for virtual image (below) → screen placed at the image plane will not form a visible image
Definition
Real image can be formed on a screen placed at the image plane but a Virtual Image cannot be formed on a screen placed at its image plane #PhysicsDefinitions