•
•The hotter the
material the more energy it emits as light
–As
you heat up a filament or branding iron, it glows brighter
and brighter
•
•The hotter the
material the more readily it emits high energy (blue) photons
–As
you heat up a filament or branding iron, it first glows
dull red, then bright red, then orange, then if you
continue, yellow, and eventually blue
•