- #1
Jimmy87
- 686
- 17
Hi pf,
Please could someone provide an explanation of why the relationship between the wavelength and size of the gap is the significant factor for determining whether or not it blocks radiation in particular reference to the mesh on the door of a microwave oven. It seems very simple when a book says "the wavelength is much bigger than the gap" as it paints in your mind the idea of something that is trying to fit through a hole that is too small but after thinking about it if this was the case then surely the AMPLITUDE of the wave would determine whether it will fit through or not. Look at this diagram:
The circle is supposed to represent a single mesh hole from a microwave oven door. I really don't see how the wavelength could influence whether or not it would go through since this will only affect when the next peak arrives? I fear this analogy and picture is too simplistic but when someone tells you the hole is much smaller than the wavelength then surely this is the picture in most peoples minds. I am guessing the explanation as to why the wavelength is important is complicated but I would very much appreciate someone who could provide an answer.
Thank you
Please could someone provide an explanation of why the relationship between the wavelength and size of the gap is the significant factor for determining whether or not it blocks radiation in particular reference to the mesh on the door of a microwave oven. It seems very simple when a book says "the wavelength is much bigger than the gap" as it paints in your mind the idea of something that is trying to fit through a hole that is too small but after thinking about it if this was the case then surely the AMPLITUDE of the wave would determine whether it will fit through or not. Look at this diagram:
The circle is supposed to represent a single mesh hole from a microwave oven door. I really don't see how the wavelength could influence whether or not it would go through since this will only affect when the next peak arrives? I fear this analogy and picture is too simplistic but when someone tells you the hole is much smaller than the wavelength then surely this is the picture in most peoples minds. I am guessing the explanation as to why the wavelength is important is complicated but I would very much appreciate someone who could provide an answer.
Thank you