Concept 1 of 9Foundation
Watch on YouTubeVideoLight and what we see
We see an object when light from it reaches our eyes. Two kinds of objects:
- Luminous: emit their own light (Sun, stars, bulb, candle flame, firefly).
- Non-luminous: need external light to be seen. They REFLECT light (Moon, book, chair, you).
The Moon is non-luminous — it just reflects sunlight to our eyes.
Example
In a dark room you can't see a book until someone turns on a light — the book was there, but no light was bouncing off it to your eyes.
💡 Tip:Flames, heated wires, and some insects are luminous. Mirrors are NOT — they just redirect light.
▶Prefer a video? Open YouTube search for “sources of light class 6”↗🎯 Try it!
5 questions to check what you just read.
0 / 5
- Q1.Which is luminous?
- Q2.Non-luminous object:
- Q3.We see a book because:
- Q4.In a dark room with no light, objects:
- Q5.Stars are luminous because: