Science Class 8
Light: Mirrors and Lenses
Use the law of reflection, and tell mirrors and lenses apart by the images they make.
11 lessons · ~58 min total
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Lessons in this topic
- 0 Start here Mirrors bounce light back. Lenses bend it as it passes through. · 3 min You are here
- 1 The law of reflection The angle a ray arrives at equals the angle it leaves at, both from the normal. · 5 min
- 2 Behind the glass A flat mirror shows an upright image, the same size, as far behind as you are in front. · 5 min
- 3 Two more kinds of mirror Concave and convex mirrors make images that a plane mirror never does. · 6 min
- 4 Curved mirrors and parallel rays A concave mirror brings parallel rays together. A convex mirror spreads them. · 6 min
- 5 Light bends A slanted ray bends toward the normal when it goes from air into water. · 5 min
- 6 The pencil that looks bent A thing under water looks higher than it is, because light bends leaving the water. · 5 min
- 7 Lenses A convex lens brings parallel rays together. A concave lens spreads them. · 6 min
- 8 What a lens shows A convex lens makes a larger image up close and an upside-down one far away. · 6 min
- 9 The big picture Eight ideas: light bounces off mirrors and bends through water and lenses. · 4 min
- 10 Track quiz A cheat-sheet of the eight rules, then ten questions on mirrors and lenses. · 7 min
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