Ihave a question that's confusing, will a large can of solids or empty can reach end of the ramp faster first in a can race? also will a small can of solids or empty can reach end of ramp faster first? explain briefly why you so much

Sawyer is studying diffraction. he draws a diagram of a plane wave to show how light waves travel. which best describes sawyer’s error? the wave fronts should be perpendicular to the direction in which the waves move. the arrow showing the direction of movement of the waves should be pointing to the left. the arrow showing the direction of movement of the waves should be pointing downward. the wave fronts should be both parallel and perpendicular to the direction in which the waves move.