The Professor and the Red light
Dominic likes to explain how things work. Which is fine, except that he tends to teach you things you already know, so his lectures can be a bit tedious. The telltale sign of a new lecture is his opening remark, "Look...'
One hectic day, Dominic approaches Daddy...
Dominic: Daddy, look...
Daddy: (groan, here's another lecture) I'm busy right now...
Dominic: (picks up the optical mouse and points to the red light underneath, where the ball is on older models) Look at this red light.
Daddy: (sigh) Yes, what about it?
Dominic: Look, if I point it at my hand, you can see the red light.
Daddy: (Duh) Yes, it's called reflection.
Dominic: But when I point it to here (the computer's LCD screen), you can't see the red light.
Daddy: (Astonished) You're right. That's pretty amazing.
And it was amazingly. And the reluctant student spent several minutes more playing with the mouse's light, impressed at what the professor discovered. Somehow the LCD screen absorbs the red light and doesn't reflect it back.
* * *
2 comments:
Ajig,
Ah, yes. The marvels of non-reflective anti-glare coating.
Marvelous thing, really. It diffuses the reflected light at odd angles, causing the reflection to be translucent.
And yes, I did just try it with my optical mouse's red light. :-)
Regards,
Jun
Jun,
IC. And it works much better than the old 'anti-glare, anti-radiation' plastic films we used to use.
Vince
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