top of page
One way Mirror
One-way mirrors (also called two-way mirrors) work by overwhelming dim transmitted light with bright reflected light.
A true one-way mirror that actually allows light to be transmitted in one direction only without requiring external energy is not possible as it violates thesecond law of thermodynamics: if one placed a cold object on the transmitting side and a hot one on the blocked side, radiant energy would be transferred from the cold to the hot object. Thus, though a one-way mirror can be made to appear to work in only one direction at a time, it's actually reflective from either side.
bottom of page