Explain how a kaleidoscope can be used as evidence to explain the behavior of light waves (help asap) PLEASE HELP

As you turn the tube you can see patterns of colors at the other end of the tube. A kaleidoscope works by reflecting light. Light travels in a straight line. When light bumps into something it changes direction.

Kaleidoscopes are made with two or more mirrors. Light reflecting between these mirrors produces multiple virtual images of stunning beauty. ... Light rays are assumed to bounce off the mirrors like a ball bounces off a hard surface. Formally stated, the angle of incidence equals the angle of reflection.

Explanation:

i believe you are right for all except the 3rd ( look at sqdancefan his answer is much better)

it's c. elements are placed in rows based on how may valencies electrons have.