Physics Van 3-site Navigational Menu

Physics Van Navigational Menu

Q & A: Grandma's microwave oven

Learn more physics!

Most recent answer: 04/22/2008
Q:
My Grandma has an (older-type) microwave oven that has no glass in the door, but has instead a metal 'grill' that has thousands of tiny holes in it - so how come the microwaves don't 'escape' and get out through the holes ?
cheater click wifes who cheat
the best android phone link phone tracking apps
free prescription cards nwwebdesigns.net walgreens prints coupon codes
imitrex 50mg thepoliticalsword.com flagyl 200mg
prescription drugs discount cards link coupons for viagra printable
viagra coupons free softballspa.com drug coupons
coupons prescriptions blog.brunothalmann.com manufacturer coupons for prescription drugs
coupon for viagra viagra trial coupon viagra discount coupons online
voltaren ára go voltaren
fusidinezuur kopen go fusidic acid
kamagra wikipedia blog.jrmissworld.com kamagra shop
cefdinir red stool ski-club-auringen.de cefdinir nedir

- Peter (age 14)
Qld. Australia
A:
The microwave frequency of most microwave ovens is 2.45 gigaHertz which gives an equivalent  wavelength of about 12.24 centimeters.  A thin conducting metallic screen a few tenths of millimeters thick having lots of millimeter size holes is an effective shield and will not let the microwaves out.  You can think of it as that the big waves can't get throuh the small holes.  The technical term is 'wave-guide below cutoff'. Since microwaves easily penetrate glass there is really no difference in electromagnetic shielding between an oven door with or without glass.  The only real improvement in glass shielding is from possible splatter of a heated liquid.
So Grandma's microwave oven is probably safe.

LeeH
why people cheat catch a cheat how many people cheat
cheater what to do when husband cheats wifes who cheat
the best android phone how to spy on cell phones phone tracking apps
married men cheat with men why husbands cheat wifes cheat
married men cheat with men why husbands cheat wifes cheat
types of abortions site what happens when you get an abortion
coupons rx prostudiousa.com www.januvia.com coupons
levaquin pill internetsellout.com furosemide pill
levitra pill go tadalafil pill
new prescription coupon viagra coupons printable prescription coupon card
1 wk pregnant abortion pill article on abortion
acheter viagra pas acheter viagra pas acheter viagra pas
viagra bestellen online viagra pillen kruidvat pillen kopen
cialis manufacturer coupon link prescription drug coupons
claritinekombo warpedfish.co.uk claritine za psa
venlafaxine gewichtstoename read venlafaxine fk
arcoxia 30 click arcoxia wiki
buscopan hund buscopan dosierung buscopan dragees
cefdinir red stool ski-club-auringen.de cefdinir nedir
cialis coupon card coupon prescription cialis coupon
trental cena link trental nuspojave

(published on 04/22/2008)

Follow-up on this answer.