Question

A convex lens with a focal length of 10 cm is located 30 cm away from a

candle. How far from the lens is the image located on the other side, to the
nearest cm? Record your answer to the nearest whole number. *

Answer 1

Answer: 15 cm

Step-by-step explanation:

According to the Lens Equation we have the following:

`(1)/(f)=(1)/(v)+(1)/(u)` (1)

Where:

`f=10 cm` is the focal length

`u=30 cm` is the distance between the candle (the object) and the lens

`v` is the distance between the image and the lens

Isolating
`v`:

`v=(uf)/(u-f)}` (2)

Solving:

`v=((30 cm)(10 cm))/(30 cm-10 cm)}` (3)

Finally:

`v=15 cm` This is where the image is located