Puzzle 5

Refraction of light

Across

1. 1 / f = (n-1)(1 / r1 - 1 / r2)

Down

1. 1 / f = 1 / v - 1 / u
2. midpoint of the lens
3. depends on surrounding medium
4. plane perpendicular to the principal axis
5. n1 sin i = n2 sin r
6. refractive index is 2.42

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Answers