Science Class 10
Light – Reflection and Refraction
Compute where a mirror or lens puts an image, and how strong a lens is.
13 lessons · ~81 min total
Track progress — 0 of 13 lessons read 0%
Lessons in this topic
- 0 Start here A roadmap: two rules for where light goes, and two formulas. · 4 min You are here
- 1 Bouncing by the rule Reflection follows two rules, both measured from one named line: the normal. · 6 min
- 2 Mirrors that are not flat A curved mirror has named parts and a focal length. · 6 min
- 3 What the mirror does to an image The image moves as the object moves along a concave mirror. · 6 min
- 4 Two rays are enough Two standard rays are enough to find where the image is. · 6 min
- 5 The mirror formula One formula links object distance, image distance and focal length. · 7 min
- 6 Bending by a rule too Light bends at a surface. The refractive index tells how much. · 7 min
- 7 The lens formula The same sign rules work for lenses. One sign in the formula changes. · 7 min
- 8 How strong a lens is A lens has a power. It is one divided by the focal length. · 6 min
- 9 Through a glass slab A glass slab shifts a ray sideways. The ray leaves in its first direction. · 8 min
- 10 Checkpoint: mirrors, lenses and slabs Six marked questions on mirrors, bending, lenses and slabs. · 6 min
- 11 The big picture Two rules for where light goes, and two formulas. · 4 min
- 12 Track quiz The nine rules from the lessons, then a question on each. · 8 min
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