True or false: mirrors and lenses

Exercise and reference answers

Questions

1. Statement is true

   Yes

   Statement

   A mirror's focal length is about half its radius of curvature.

2. Statement is true

   Yes

   Statement

   The mirror equation is 1/v + 1/u = 1/f.

3. Statement is true

   Yes

   Statement

   The thin lens formula is 1/v − 1/u = 1/f.

4. Statement is true

   No

   Statement

   The mirror equation and lens formula have identical signs.

5. Statement is true

   Yes

   Statement

   The lens maker's formula uses both radii of curvature.

Explanation