Hot CD's and DVD's, is it okay?

[agallag]

I can't remember if this is the logic exactly, but it goes something like this. When you made the first choice, you had a 1/3 chance of picking the correct door. Once the first door is opened, there is then a 50% chance that the other door hides the car, which is better odds than you had when you picked the first door, so you should change your answer at this point.

Sounds stupid, but I think the math works.

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Andrew

[Brian R.]

Since the odds are now 1:1, there is no advantage to changing or holding. Stick with your first choice for no good reason. If you change and you're wrong, you'll kick yourself.

[agallag]

Obviously once you're down to two choices, it's 50-50, that's just how I remember this particular problem being rationalized. I didn't really agree with the solution.

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Andrew

[Sisyfos]

Well, you've got three scenarios.

1. You choose goat1, showmaster removes goat2

2. You choose goat2, showmaster removes goat1

3. You choose car, showmaster removes goat

In two out of three, it's beneficial to choose the other door.

He, I hope this isn't flawed?

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[Jorden]

Excuse me for getting back at the actual topic, why DVDs and CDs get hot in the DVD/CD-ROM player (NOT !! CD-R or RW!!): Just because they spin at that spindle. It doesn't need to take 20 to 30 minutes. Just leave it in for 5 minutes in a 50-speed CD-ROM or any new DVD-player (which now are at 32-speed CD-ROM style), then take it out, and it'll be hot. Why? Just friction from air-particles bouncing against the CD/DVD, the components in the drive heating up (and heat rises, and most components are under the CD!!).

Okay, but what about the laser?
The laser is so low in Watt's that it doesn't count. The only way it could harm you, is if you broke it open and watched directly in the laser without protective glasses. But then your eyes and brain would heat up, and everything would go black all of a sudden. Especially after you looked at it for 20 to 30 minutes (Blindness stikes at lightning speeds...)

Jord.

[Digital_Hell_Native]

Sisyfos you are right!