Light through a prism

Do it

Explain in the diagram why the pencil appears to be in a different place when viewed through the prism. Answer the questions.

How to draw an experiment?

Järgnev joonis selgitab, kus me pliiatsit näeme, kui vaatame seda läbi võrdkülgse klaasprisma.

How to conduct the experiment?
Light through an equilateral prism

Katse skeem on selline:

Why do you think a pencil looks crooked when viewed through a glass prism?