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Jeff Lundeen Profile picture
Jeff Lundeen
@LundeenOttawa
Father, Physicist, Researcher, Professor. Optics, Quantum Photonics, and Quantum Information. @uOttawa @JCEP8 @NexQT @LundeenOttawa@qubit-social.xyz
Dec 15, 2021 • 8 tweets • 4 min read
Do you remember the world’s very first nuclear meltdown? That time the US President, an expert in nuclear physics, heroically lowered himself into the reactor and saved Ottawa, Canada’s capital?

Sounds like schlocky action movie, but it actually happened! Read more here:
cnn.com/2011/OPINION/0…
Nov 20, 2020 • 23 tweets • 10 min read
1/ Why do things look flat through binoculars? These two photos show forests taken with a telephoto lens and wide-angle lens. The first is flat and abstract. The second has depth and realism. This thread explains this and why the most popular optics textbook gets it wrong. ImageImage 2/ Here is another example, a portrait taken with different lenses. The lenses have different focal lengths f, from short (wide-angle) to long (telephoto). So, you might expect focal length is related to this effect. Not quite. Image