Marchers moving more slowly in sand, bent from initial path Path of Sand marchers bends If the marchers head off the pavement at an angle other than 90°, their path will bend (refract) as they hit the sand because some will be walking more slowly than others. Pavement Line of marchers Sand with arms intertwined b If they march straight off the pavement, the ranks will slow down but not bend as they hit Sand Marchers with closer spacing Pavement the sand. Path of marchers doesn't bend if they march straight off the edge Street ends Sand here Figure 6.21 An analogy for refraction. The ranks of marchers represent light or sound waves; the pavement and sand represent different media. The marchers can walk faster if they stay on the pavement than if they walk in the sand next to the highway. Gujwee obebueg o

Marchers moving more slowly in sand, bent from initial path Path of Sand marchers bends If the marchers head off the pavement at an angle other than 90°, their path will bend (refract) as they hit the sand because some will be walking more slowly than others. Pavement Line of marchers Sand with arms intertwined b If they march straight off the pavement, the ranks will slow down but not bend as they hit Sand Marchers with closer spacing Pavement the sand. Path of marchers doesn't bend if they march straight off the edge Street ends Sand here Figure 6.21 An analogy for refraction. The ranks of marchers represent light or sound waves; the pavement and sand represent different media. The marchers can walk faster if they stay on the pavement than if they walk in the sand next to the highway. Gujwee obebueg o