Hello! Do it has answer choices or no?
1111111111111111111111111111111111111111111111111111111 = 1111111111111111111111111111111111111111111111111111111
Crest - the highest point in the wave. Trough - the lowest point in the wave. Wavelength - the horizontal distance
When we hold a large plastic bag between the light source and the wall the plastic will block the light partially, not all the light because plastic is semi translucent.