Somebody in the lab asks you to get them an E-plane bend or an H-plane bend. You can’t remember which way the fields go in the waveguide, but you don’t want to look stupid by asking. Don’t panic, there is an easy easy way to remember which is which. The E-plane bend is bent the “easy way”, and the H-plane bend is bent the “hard way”, which you can see in the photo below. If it isn’t obvious to you what is meant by easy and hard way when you are bending something of rectangular cross-section, it is not too late to consider a career shift to the software industry