Bounce light off it.
Be reflected off the window.
Be transmitted trough the window.
The water bends the light hitting its surface
The water absorbs light hitting it
The water transmits light passing through it
The water bounces off the light hitting its surface
The water bends the pencil.
The pencil is broken.
Light that passes through the water is refracted.
Light that passes through the water is reflected.
Light being reflected on a mirror.
Light being refracted in a prism.
Light being transmitted through a window.
Light being absorbed by a wall.