I think he means a literal one way mirror, much like the "sail" on the proposed nuclear explosion powered spacecraft that passes gamma radiation one way, but not the other. So a perfect one way mirror would be perfectly transparent in one direction and perfectly reflective in the other.
Because the "atoms" in your hand are molecules and even at the smallest size are 4-5 times bigger than a helium atom. Not to mention pseudo-surface tension in the phospholipid bilayer and the spacing between the individual units as described by the fluid mosaic model dictate what can/cannot...
I heard that there was a wavelength of "light" that partially permeates through the human bodies skin and can degenerate the nerve endings before the skin succomes to the harmful effects of the "light". This sounds like complete bs to me since the interaction wavelengths of different tissues...
It is possible that the cells were poorly chosen and the trigger to switch cells (if that is in fact the case) is unable to operate due to unsuitable terms, i.e. too low of a voltage drop being produced in a time too fast to switch cells. Although that sounds incredible stupid coming from a...
Always learn and test things (when possible) with the lowest voltage (protection for your components) and with the lowest current possible (protection for you). While AC won't travel as far without a conductor (open air, etc.) as a DC of equal voltage will. (I have no source for this; if you...
A generator wouldn't be that hard to do. You would just use an MCU controlled digital potentiometer to apply resistance to the motor windings. Then it is just a matter of measuring the change in voltage to determine speed. Make sure you have a set of diodes in place at least equal to the...
This may not be a "good" method, but it should work and is easy to do with basic chemistry knowledge. The gist of the equation would be
Manganese(VII) oxide + meth/ethanol (Any oxidize-able organic molecule) = Ignition source; and really be something along the lines of; C2H4O2 from Mn2O7 and...