Need Lounge Physics/Appliance expertise: OBD kid ran microwave empty for 5 minutes

[OmahaBlueDog]

I don't think there is any radiation danger, but what is the procedure for this?

[hobbit709]

1. If it still works, no problem.

Running it empty won't leak any more electromagnetic radiation out of the case than running it full.

[OmahaBlueDog]

2. First, thanks

Second, why is "running it empty won't leak any more electromagnetic radiation out of the case than running it full" not comforting?

[petronius]

3. It'll be OK. Just subtract 5 minutes next time you cook something, to even it out

:)

[Rabrrrrrr]

4. No danger whatsoever. All it was was a waste of energy.

Nothing to worry about.

[MilesColtrane]

5. Look on the bright side.

He'll be able to read in bed at night without a flashlight.

[Gidney N Cloyd]

6. Shouldn't pose a problem as long as the X-Men are still hiring.

[HopeHoops]

7. If it didn't blow up, it is fine.

When they catch fire, you've got a little bit of a problem.

[pokerfan]

8. Probably nothing to worry about

A microwave oven is essentially a transmitter and antenna (waveguide). An empty microwave would present no load to the magnetron which would create a horrible transmission mismatch, resulting in a great deal of reflected power adding to the transmitted power resulting in higher than normal peak voltage. However, I expect that most modern microwave ovens are designed for this almost certain eventuality.

[rug]

9. Did you really want grandchildren?

[OmahaBlueDog]

10. Aw, heck - I guess not!

And hopefully, if the folks in GD can get their Senators in gear, I can afford to get the 40lb tumor removed.