I’ve asked this kind of thing before, but I’m trying again.
Textbooks show the wavelength measured along the path of travel, like N-S if it’s traveling north.
So, the light is traveling north toward the screen in a microwave door. I’m told that it can’t fit through the gap in the metal mesh, but that requires viewing the wavelength as being measured E-W. The physics people keep turning the wave 90 degrees, and I admit that it seems to be true, given the effectiveness of the metal screen, and the fact that tv antennas work better if you view the wave as being at 90 degrees to the path of travel from the broadcast point.
I can’t get someone to explain how this works in terms I can grasp. I’ve asked 2 physics majors from actual respectable universities, and the guy leading an AP Physics seminar next door to mine (chemistry). I asked on this board if the wave idea can be viewed as being essentially a sphere, but was told “No.”
I found this phrase, “Basically, because light is a 2-dimensional wave, it will propagate in a helix.” It references this diagram: https://miro.medium.com/max/3000/1*MUBa9GXeZazJT1fzZJNL1Q.jpeg
I’ve been told that the diagrams of the wave being measured along the path of travel are over simplified, but what is the correct view or situation?