The actual and the apparent depth of the beetle is expressed as:

$\overline{){\mathit{\eta}}{\mathbf{=}}\frac{{\mathbf{d}}_{\mathbf{a}\mathbf{c}\mathbf{t}\mathbf{u}\mathbf{a}\mathbf{l}}}{{\mathbf{d}}_{\mathbf{a}\mathbf{p}\mathbf{p}\mathbf{a}\mathbf{r}\mathbf{e}\mathbf{n}\mathbf{t}}}}$

Therefore, d_{actual} = ηd_{apparent}

A biologist keeps a specimen of his favorite beetle embedded in a cube of polystyrene plastic. The hapless bug appears to be 2.0 cm within the plastic.

What is the beetle's actual distance beneath the surface? Express your answer using two significant figures.

Frequently Asked Questions

What scientific concept do you need to know in order to solve this problem?

Our tutors have indicated that to solve this problem you will need to apply the Refraction Of Light concept. You can view video lessons to learn Refraction Of Light. Or if you need more Refraction Of Light practice, you can also practice Refraction Of Light practice problems.