Light refraction concepts
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Light changes speed and direction when moving between substances like air, water, and glass due to variations in density. Reflection and refraction occur as light speeds up or slows down, with denser materials like water and glass slowing light the most and causing it to refract or change direction. Convex and concave lenses can respectively bring light rays together or spread them out depending on the lens type.
Light refraction concepts
- 2. The topic of reflection and refraction lends itself to misconceptions illustrations in textbooks are often not adequate to explain these concepts.
- 3. The speed of light changes as it travels through various substances. A change in speed may cause the beam to change its direction of travel (refract). A pencil placed partway in water looks bent.
- 5. Water is denser than air it has more matter in the same space. Glass is denser than water. When light enters a denser medium, it slows down. When light enters a less dense medium it speeds up.
- 6. CONVEX CONCAVE Cause light rays to converge (come together). Cause light rays to diverge (spread out).
Editor's Notes
- Use the analogy of running through an empty room versus running though a room full of people. The extra matter would slow you down.
- People have learned to control light refractions with lenses