B bart New member Mar 29, 2010 #1 When shining a while light(non-LED) flash light on the inside of your palm, red light is observed when it travels through the hand. What would happen if a LED flash light is used instead?
When shining a while light(non-LED) flash light on the inside of your palm, red light is observed when it travels through the hand. What would happen if a LED flash light is used instead?
