watch this video about Gravitational waves and LIGO.
Do you have any questions?
There were two elements to the reading last week on black holes that I wanted you to delve into. One is gravitational waves and the other is hawking radiation. lets start with gravitational waves - Gravitational waves are waves in
What sort of thing would be stretched if a gravitational wave passed by
Review - what is absolute zero?
I have mentioned before the three laws of thermodynamics
you can't win
you can't lose
you can't get out of the game
match these to what their laws actually state.
| Draggable item | arrow_right_alt | Corresponding Item |
|---|---|---|
you can't break even | arrow_right_alt | you cannot get more energy out of a system than you put into it. |
you can't get out of the game | arrow_right_alt | entropy always increases, some usuable energy is always lost as unusable energy |
you can't win | arrow_right_alt | you will never reach absolute zero |
Hawking radiation hinges on two things - Black holes can't be absolute 0, because nothing can be, and Entropy is always increasing. But the theoretical temperature of a black hole is insanely low. The temperature of outer space is a balmy 2.7 kelvins. We believe the temperature of a _small_ black hole to be as high as 6 x
watch this video for a more in depth explanation of the above.
we will be talking about these two concepts as well as what you are listening to in your podcast this weekend. We will have a session test week 9, and just review formatives for that next weekend. But there will be a lot about relativity coming up, and we did have a minute physics about general relativity last week, so to prep you for what is coming, I thought I would start you with the introduction to the series of videos you will be watching after the test.
who's excited?