Explain refraction of light with a simple example
The short version: refraction of light refers to the bending of light as it passes from one transparent medium into another. A quick example makes it concrete — Light entering glass from air bends toward the normal because glass is optically denser.
How to approach it step by step
Once one example makes sense, the method generalises: apply Snell's law n₁ sin i = n₂ sin r and track whether the ray bends toward or away from the normal. In a visual interactive session the example is built on screen piece by piece, so you see which quantity changes at each step instead of only reading a final answer. Ask for a harder variant and the explanation adapts on the spot.
Worked example
Light entering glass from air bends toward the normal because glass is optically denser.
The mistake most learners make
Measuring angles from the surface instead of from the normal.
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