Posted by **Emily** on Thursday, May 27, 2010 at 12:19am.

An image of a candle is produced by a convex lens 14 cm away. If the focal length of the lens is 7 cm, how far from the lens is the candle placed?

(USe the thin lens equation)

For this question, how would you know whether the image is virtual or real?(in order to know if the distance to the mirror is negative or positive)

## Answer this Question

## Related Questions

- Physics - i have a question on thin lens equation how do i know when di is ...
- physics - A 7·cm tall candle is placed 125·cm from a lens with a focal length of...
- physics - A box is placed 50 cm away from a double convex lens. The image is on...
- Physics - A lighted candle is placed 38 cm in front of a diverging lens. The ...
- Science Important - 1. A toy of height 18.4 cm is balanced in front of a ...
- physics - Where should the birthday candle of height 5 cm be placed in front of...
- physics - Because a concave lens cannot form a real image of a real object, it ...
- calculus problem - the thin lens equation in physics is 1/s+1/S=1/f where s is ...
- Physics: Lenses - 1) A convex lens with a focal lenght of 4.0cm is placed 20.0cm...
- Physics - A lens with a focal length of 25 cm is placed 45 cm in front of a lens...

More Related Questions