You wake up at 3 in the morning and decide to get something to drink you bump into a dark wall on your way to the kitchen explain how either refraction reflection or absorption of light is involved in the in that situation

This may depend on whether the curves in

path Y slow the marble down

The displacement is the same for both

paths, so the marble that took the shortest

time is the fastest.

The marble travelled in a straight line

for X, so the direction did not change.

For path Y, the direction changed so the

velocity changes even if the speed does

not.

Explanation:

show the wavelengths of a wave. show the crests of a wave.

float.

archimedes' principle

denser than water sinks in water.

denser than mercury would sink in it