Question

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

Answer 1

Answer: 15 cm

Explanation:

According to the Lens Equation we have the following:

$\frac{1}{f}=\frac{1}{v}+\frac{1}{u}$ (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 $v$:

$v=\frac{uf}{u-f}}$ (2)

Solving:

$v=\frac{(30 cm)(10 cm)}{30 cm-10 cm}}$ (3)

Finally:

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