Refraction

Reflection

Transmission

Absorption

The passage of an EM wave through a medium. The sun is transmitting light through the window.

The disappearance of an EM wave into the medium. The concrete is absorbing the light coming from the sun.

Reflection is the bouncing back of a wave after it strikes a barrier. The image of the mountain bounced back to the water.

Refraction is the bending of a wave as it crosses a medium. The straw looks as if it bends through a medium which is water