Summary
Where does light come from, and how do we see? This introduction covers light sources, how light travels in straight lines, and how reflected light lets us see objects. A good opener for a light unit.
Viewer safety
All ages
Common Sense Media — not yet ratedIMDb Parents Guide — not yet rated
Our rating is a quick teacher-to-teacher guide — preview before showing.
Teaching resources
Discussion questions
Discussion
We can only see objects when light reaches our eyes.
- What are some natural and human-made sources of light?
- Why can't you see anything in a completely dark room?
- How does light let you see an object that doesn't glow on its own?
- What happens when light hits a mirror?
Quick work-a-long
Vocabulary: light, source, reflect, transparent, opaque.
Try it: Find three light sources in your day. Which are natural and which are human-made?