*x Why does light refract when it encounters the glass in a lens?

Question

1×
A
because it speeds up, which causes it to bend
1×
because it slows down, which causes it to bend
because it hits a dense medium, which causes it to bounce off
because it gets absorbed, which causes it to lessen in intensity

Answer 1

Light refracts when it encounters a glass lens primarily because it slows down, which causes it to bend. When light passes from a less dense medium (like air) into a denser medium (like glass), its speed decreases, and the change in speed results in a change in direction. So, the correct answer is:

because it slows down, which causes it to bend.