(Individual bookwork) Warm Up: Define each term.
Question: Why do leaves change color in the fall?
(Lecture, 15-20m)
I. Light and Radiation.
Radiation - way in which energy is transmitted through
space.
Waves, light, radiation, rays all mean the same thing.
a. visible light -
human eye sensitivity - light enters eye, cornea and
lens focus it onto the retina, triggering chemical reactions sending electrical
impulses to the brain, producing the sensation of sight.
b. invisible radiation - undetected