Soon he's emitting light and his weight starts creeping mysteriously toward zero.
The now excited nucleus need to lose energy and does this by emitting light.
As they drop back down, they get rid of their extra energy by emitting light.
This molecule then loses the excitation energy by emitting light of the proper wavelength.
When they return to their normal energy states, they give off the extra energy in part by emitting light.
It is a very normal impulse to stare at something in your hand that is emitting light.
And then, just like a jolt of static electricity, the electrons jump to nitrogen or oxygen molecules in the air, which shed the excess energy by emitting light.
But we watch the glowing television, the screen emitting light -- and in the sitcoms, as with professional wrestling, the very corniness of the fakery makes it somehow real.
Granted, the lamp's cells run according to their own biorhythm, "charging" during the day and emitting light at night -- so there's no on and off switch.
Rather than emitting light directly, it contains stainless-steel yarns coated with "thermochromic" inks that, as their name suggests, change colour depending on the temperature.
Actively emitting light requires a lot of energy.
