It depends on the framing of the question a bit. If we are defining 100% efficiency as 100% of electrical energy being converted into kinetic energy (heat) by the device, then that is a no. Some percentage is emitted as EM radiation instead of heat. If they were so then a light bulb or a bomb is a 100% effective heater as well.
Black-body radiation is an interesting argument against 100% efficiency, but couldn’t you just extrapolate and argue that the emission will be converted back to heat once it stops reflecting and becomes absorbed?
ChonkyOwlbear@lemmy.world 8 months ago
CookieOfFortune@lemmy.world 8 months ago
It depends on what you consider the room: Both a light bulb and a bomb would deliver all their energy around a fully enclosed room. Incandescent bulbs are indeed effective heaters, LEDs just deliver much less energy. And a bomb, by design, is hard to contain in a room.
lemmyng@lemmy.ca 8 months ago
That’s like arguing that trickle down economics is efficient because the money eventually gets into the hands of the poor.
Phil_in_here@lemmy.ca 8 months ago
That’s like arguing that 99% of the light off a heating element is a laser beam directed straight into deep space.