Match each formula to what it describes

Exercise and reference answers

Matching pairs

1. Left

   1/v + 1/u = 1/f

   Right

   the mirror equation

2. Left

   1/v − 1/u = 1/f

   Right

   the thin lens formula

3. Left

   1/f = ((n₂−n₁)/n₁)(1/R₁ − 1/R₂)

   Right

   the lens maker's formula

4. Left

   sin i / sin r = n

   Right

   Snell's law of refraction

5. Left

   ∠i = ∠r′

   Right

   the law of reflection

Explanation