NEET · Physics · Refraction & Lenses

Exercise and reference answers

Matching pairs

1. A

   Snell's law

   B

   n₁ sin θ₁ = n₂ sin θ₂

2. A

   Critical angle

   B

   sin θ_c = 1/n (denser → rarer)

3. A

   Lens formula

   B

   1/v − 1/u = 1/f

4. A

   Lensmaker's formula

   B

   1/f = (n−1)(1/R₁ − 1/R₂)

5. A

   Magnification

   B

   m = v / u

6. A

   Power of a lens

   B

   P = 1 / f (in metres)

Instructions

Flip cards to match each optical relation to its formula.