Choose all that apply. light travels in transverse waves cannot travel through a vacuum slows down when traveling through denser substances speeds up when traveling through more dense substances can be absorbed and transformed into heat

Can be absorbed and transformed into heat. i know this because i used to work as a constructor for lights and i had to go over a training on this subject.

This is what i found on google “according to the collision theory, the following criteria must be met in order for a chemical reaction to occur: molecules must collide with sufficient energy, known as the activation energy, so that chemical bonds can break. molecules must collide with the proper orientation.” i hope this information you.