On Thu, 19 May 2016 18:56:44 +0100, Chris Hogg wrote:

On Thu, 19 May 2016 18:24:00 +0100, Graham.
wrote:

On Thu, 19 May 2016 10:04:14 -0700 (PDT), wrote:

On Thursday, 19 May 2016 17:44:04 UTC+1, John A Knight wrote:
replying to MM, John A Knight wrote:
http://www.scienceabc.com/pure-scien...aves-leak.html
snip

That site's info re hole size & leakage is complete ballcocks.


https://groups.google.com/d/msg/uk.d...I/WSBDBrNF0GkJ

Clearly the OP needed to buy a new microwave, but from an RF
perspective the information on that scienceabc.com page is actually
quite accurate.


I thought it was complete ******** too; it treats microwaves as if
they're tennis balls, but I'm no microwave expert. If it's not
********, and if microwaves can't leak out of a hole smaller than 12
cm. why all the fuss in the past about microwaves leaking around
ill-fitting doors, and why the need for a fine mesh across the window
in the door? If the article is OK, you barely need to shut the door,
let alone worry about leaks around the edge, and wide-mesh netting
would do in the window allowing a much better view of the contents.
What am I not understanding?

A narrow slot several centimetres in length as in an ill fitting door
would leak energy of the appropriate polarisation.
https://en.wikipedia.org/wiki/Slot_antenna

--

Graham.

%Profound_observation%