ZeroUnderOne
Smash Apprentice
In addition to this, in most or all energy conversions there is loss of energy by heat. There's no such thing as 100% energy conversion (I think this is right, but I could be forgetting one or two very specific case).
One of the exceptions is the fountain effect of super fluid helium. Energy from light converted purely to mechanical energy because of the zero entropy/zero viscosity property of superfluid helium undergoing a second order phase transition into liquid helium.
Check it out on the youtubezzzzzzzzzz
PS: <3 you guys and this thread