Author: dkagan
Hello Spring 2020 Students!
Welcome to physics 1 for the Spring of 2020! You can find basic course information by clicking on the “Welcome!” link on the upper-right or following the link below:
Hello Summer 2019 Class!
Welcome to physics 1 for the summer of 2019! You can find basic course information by clicking on the “Welcome!” link on the upper-right or following the link below:
The First Image of a Black Hole
(If you are looking for course info, contact info, and so on, click on “Welcome” at the upper-right corner of this page.)
Today is truly historic. An international collaboration of scientists has managed to collect light (in the radio wavelength of the spectrum) and put it together to develop the first direct image of a black hole!
More accurately, what we are seeing is a shadow or silhouette of the black hole against the light that manages to just barely escape its gravitational pull.
Veritasium has put together a wonderful video explaining what such an image actually shows us. Take a look here:
Conservation Laws and Newton’s Cradle
A student shared the following marvelous MythBuster’s video with me:
You’ll see that this huge version of Newton’s cradle performs significantly worse than the smaller version that you can come play with in the physics department office (SENG 203). What’s going wrong? Do the laws of momentum and energy conservation somehow break down when you get bigger? The MythBuster’s provide a very nice explanation if you watch through the video above.
Redefining the Kilogram
Here’s a great video about the upcoming redefinition of the kilogram: