But sometimes reflections can be annoying. They can get in the way of what you want to make pictures of. This usually happens with windows, where light bouncing off the glass can obscure your subject.

When light travels from air into glass it slows down because glass is more (optically) dense than air. This change in speed can cause the light to bend at the boundary between the two transparent ...

Repeat steps 2 to 8 for a rectangular glass block. Measure the angle of incidence, angle of reflection and angle of refraction inside the block for each block.