What is refraction of light in physics?
In physics, refraction of light refers to the bending of light as it passes from one transparent medium into another. It matters because the same idea reappears across many later topics, so building a clear mental picture of it early saves a lot of time.
How to approach it step by step
To work with refraction of light confidently, apply Snell's law n₁ sin i = n₂ sin r and track whether the ray bends toward or away from the normal. LetMeTeach draws this out live on screen while explaining it aloud, so you watch each part appear instead of decoding a static block of text. You can interrupt at any point and ask for the same idea again in simpler words, in another language, or with a different example.
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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