1. Light Emission: Luminous objects, like the sun, stars, or light bulbs, produce light energy. This light energy is made up of tiny packets of energy called photons.
2. Photon Travel: These photons travel outward from the luminous object in all directions.
3. Reaching the Eye: Some of these photons travel towards our eyes.
4. Eye Interaction: The photons enter our eyes and interact with the light-sensitive cells in our retinas.
5. Signal Transmission: These cells convert the light energy into electrical signals that are transmitted to our brains.
6. Brain Interpretation: Our brains process these signals and interpret them as images, allowing us to see the luminous object.
In contrast, we see non-luminous objects because they reflect light. Non-luminous objects don't produce their own light; instead, they absorb some of the light that falls on them and reflect the rest. This reflected light reaches our eyes and allows us to see the object.