If you walk 5 blocks to school, then 5 blocks back home because you forgot your homework, then 5 blocks back to school, your distance traveled is _15, but your displacement is __0. This is because (distance, displacement) is a quantity where direction does not matter (a quantity, while (distance, displacement) is a quantity where direction does matter (a quantity).

Explanation:

If you walk 5 blocks to school, then 5 blocks back home because you forgot your homework, then 5 blocks back to school, your distance traveled is _15__blocks, but your displacement is __0. This is because __distance (distance, displacement) is a quantity where direction does not matter (a __scalar quantity, while displacement (distance, displacement) is a quantity where direction does matter (a vector quantity)

waves moving from a fast medium to a slow medium will experience a reflection as light travels more slowly than red light. total internal reflection occurs when the critical angle is.