Thin Lens And Lens Maker Equations Video Lessons

Concept

# Problem: The sun is 150,000,000 km from earth; its diameter is 1,400,000 km. A student uses a 5.2-cm-diameter lens with f = 10 cm to cast an image of the sun on a piece of paper.Where should the paper be placed relative to the lens to get a sharp image?

###### FREE Expert Solution

Lens equation:

$\overline{)\frac{\mathbf{1}}{\mathbf{f}}{\mathbf{=}}\frac{\mathbf{1}}{{\mathbf{s}}_{\mathbf{o}}}{\mathbf{+}}\frac{\mathbf{1}}{{\mathbf{s}}_{\mathbf{i}}}}$

We only need focal length and the object distance to solve this problem.

###### Problem Details

The sun is 150,000,000 km from earth; its diameter is 1,400,000 km. A student uses a 5.2-cm-diameter lens with f = 10 cm to cast an image of the sun on a piece of paper.

Where should the paper be placed relative to the lens to get a sharp image?