Visit this site: https://www.physicsclassroom.com/Physics-Interactives/Refraction-and-Lenses/Optics-Bench/Optics-Bench-Refraction-Interactive You should see a candle and a converging lens on a grid.

Stronger lenses will bend the light rays more dramatically. Use focus slider to change the focal length of the lens. What effects do you see as the focal length changes? How are they alike or different from what you saw by moving the candle? e. Change the "Converging" Lens to a "Diverging" lens by selecting the options in the top right corner of the simulation. Move the candle and focal lengths around. What do you observe f. Change the lens to a mirror (by clicking on at the top of the simulation). Move the candle around on both sides of the mirror. What do you notice about the light rays and the image formed of the Candle