wjs018

I have a PhD in and am a practicing physicist in the field of rheology. I think this is an interesting way to explain viscoelastic materials to people. My go-to example is usually Silly Putty, but cats are something that just about everybody has some experience with.

I guess it depends what you want to do with it. I do lots of product photography, so I know exactly what lens I need for my studio and the type of product I am shooting. So, I spent about as much on a lens as I did a body. Getting a better sensor with more accurate colors saves me time in the post-processing step.

When I was starting out, I just used a kit zoom lens, but realized that most of my shots were around the same focal length. So that is when I invested in a faster, nicer prime lens at that focal length.

I wrote my PhD thesis about bacterial flagella. Not about the motor though (which is incredible), but about the long part of the flagella that is extracellular. It is able to change its shape as the bacteria moves. The mechanism by which this happens is at the same time quite simple, but just about impossible to explain via text. Really, really neat bit of evolution that has proven to be home to incredibly rich physics that is still being studied to this day.