Thin Lens And Lens Maker Equations Video Lessons

Concept

# Problem: How far from a piece of paper must you hold your father's 2.25 D reading glasses to try to burn a hole in the paper with sunlight? (Answer in cm)

###### FREE Expert Solution

Power of a lens:

$\overline{){\mathbf{P}}{\mathbf{=}}\frac{\mathbf{1}}{\mathbf{f}}}$, where f is the focal length of the lens.

The paper should be at the focus of the lens.

###### Problem Details

How far from a piece of paper must you hold your father's 2.25 D reading glasses to try to burn a hole in the paper with sunlight? (Answer in cm)