the little light on the bottom of a mouse makes your whole fingertip glow red - but you can't see the insides.. what is going on?
2006-10-06 20:14:03 · 3 answers · asked by Julia W 1 in Science & Mathematics ➔ Other - Science
Its the calcium in your finger nail that reflects it.
2006-10-06 20:44:42 · answer #1 · answered by Anonymous · 0⤊ 0⤋
Human tissue is relatively transmissive to red light. However, the red blood cells diffuse the light, i.e., like ground glass.
If you get a strong enough red light, like a laser pointer, you can see the faint shadow of your pinky finger bone.
Also kind of cool is that the laser speckle from a laser pointer, when placed against your flesh will vibrate and move, caused by the constant motion of your red blood cells
2006-10-07 04:01:35 · answer #2 · answered by arbiter007 6 · 0⤊ 0⤋
Maybe because the finger is thin and it has more collagen
2006-10-07 03:59:24 · answer #3 · answered by cris_tuason 2 · 0⤊ 0⤋