Move the intensity slider back to 0%. Choose OPTIONS/SHOW PHOTONS from the toolbar at the upper left. From now on, you should see individual photons instead of a light beam from the light source. Move the intensity slider from 0% to
100% to see what effect this has on the beam of photons. As the intensity increases, what effect, if any, does this have
on:
a) The number of photons?

Arunner is jogging at a steady 3.6 km/hr. when the runner is 2.9 km from the finish line, a bird begins flying from the runner to the finish line at 14.4 km/hr (4 times as fast as the runner). when the bird reaches the finish line, it turns around and flies back to the runner. even though the bird is a dodo, we will assume that it occupies only one point in space, i.e., a zero-length bird. how far does the bird travel? (b) after this first encounter, the bird then turns around and flies from the runner back to the finish line, turns around again and flies back to the runner. the bird repeats the back and forth trips until the runner reaches the finish line. how far does the bird travel from the beginning? (i.e. include the distance traveled to the first encounter)