Hey guys, I'm not exactly sure on which forum I should be posting this topic but I decided to post it here. Any mod can move it if deemed necessary. Anyway, I have been wondering about the infrared wavelengths that a remote control emits when trying to control, say, a TV or VCR/DVD player I read that the infrared wavelength must follow line-of-sight to the infrared receiver in the device that is being controlled. For example, a infrared laser cannot travel around corners. However, if I point my remote control in the opposite direction, facing my black couch, the device can still be controlled. Is this because of some kind of "bouncing-off" effect? Can someone explain the physics of what is going on? Also, if a panel of glass is placed over the infrared receiver, will it still pick up the remote control signals? What about paper? What about a tank of water? The reason I am asking is because I am interested in how infrared wavelengths can be applied and I don't have the means to actually perform these experiments. If anybody can shine any light on this subject, it would be greatly appreciated. Thank you.