Refraction of waves towards the beach
As you see from my parents’ attire and the lack of leaves on the trees, these pictures are not brand new. But still interesting: Do you see how the waves…
Tag: dispersion
Waves change their direction because of changes in water depth
When waves run up a beach, they change their direction because for shallow water waves, phase speed depends on water depth (see this post for a nice little visualization for…
Observing hydrodynamic phenomena on a creek
Looking at a creek on a Sunday stroll, and seeing lots and lots of concepts from hydrodynamics class. For example below, you see waves radiating from each of the ducks. And…
What are the ingredients of a rainbow?
Still collecting materials for our instructional short movies. A while back I talked about how my colleague and I were experimenting with short instructional screen casts, and I shared some…
Why do we only see rainbows in the mornings and evenings, but never at noon?
Another movie on rainbows My dearest readers, I hope you are still as fascinated by rainbows as I am? Today I’m giving you another movie explaining something rainbow-related, namely why…
Rainbows III
Updated movie following Arne’s advice. When I asked for feedback on the rainbow movies the other day, Arne had a pretty good idea for how one of the explanations could…
Secondary rainbows
Sometimes you get lucky and see a double rainbow. But how does the second rainbow form? On my first 17th of May in Bergen, Ellen invited me to her home…
Rainbows and refraction II
Taking the same graphics as in this post, but presenting them differently. In the previous post, I presented a screen cast explaining, in a very text-booky way, how rainbows form.…
Rainbows and refraction
Why is a rainbow always red on top and blue at the bottom? We always talk about prisms and refraction and stuff, but be honest – would you be able to…