@3:34:29 ... one thing ought to have been mentioned here: The red laser would not arrive at the standing viewer at any speed other than c.... BUT, if the driver is firing that laser from a car moving 0.9999999999 c, the observer wouldn't see the laser's beam anyway. The laser's light would be blue-shifted into hard gamma, and the flash would make the observer's entire skull and its contents inoperable and very swiftly dead.
Yeah, it's certainly blueshifted. However, I think the stationary observer measures lower laser oscillator frequency inside the car, while the driver measures normal clock frequency. Both measure shorter distance b/w the stationary observer and the car. These cycles must fit into that distance. However, I think the stationary guy could see more luminous laser (and car) due to relativistic lensing. Due to this relativistic lensing the car guy must see his laser photons hitting the stationary guy even after he has driven past the stationary guy.
Close: cycles (e.g. phase) is Lorentz invariant: all observers agree, so is the number of photons in a laser beam. The only problem is, when analyzing a length of laser at the same time in different frames, you have to include the relativity of simulatenaety, a finite length at an instance in the car frame, spans time in the stationary frame. Sometimes you just have to do the Lorentz transform
The more advanced topics would be mathematics-based, as well as demonstrating data-collection and interpretation methods. Basically, this course just gets you the current paradigm, but doesn’t get you ready to be a researcher. It does get you ready to be knowledgeable about what you are seeing in your personal telescope and how to understand public talks and what astronomers are talking about.
I’m actually really proud of this particular video series. It’s a topic that’s usually skipped over by public speakers. It’s also something that’s very hard to communicate without using math and a lot of explanation.
Truly well done lectures!! I’m only about a third the way through and can honestly say there’s no difference between these and ones I wasted thousands of dollars on in University…… 😒
Excuses Excuses :-) Tralfamadorian Teacher: Joey. Why are you late for school? Joey: Ummm... Well. I was running as fast as I could. But I couldn't run faster than the speed of light.
@@JasonKendallAstronomer Yes. When Joey is late, he runs at the speed of late. And he has even more excuses. Tralfamadorian Teacher: Joey. Where is your homework? Did your dog eat it? Joey: Umm... No. It fell into the black hole.
What crazy elevator emergency brake takes 30 stories to stop the fall? If the cable broke when you were at the 25th floor you wouldn't have an amusing story, you'd have a splat! YOU lucky! Art
@@JasonKendallAstronomer Hey, I didn't notice this for a week! By the way, I am from Ethiopia and I am currently trying to apply for international universities (Under Graduate). Do you know any universities in the U.S. or any other country that give scholarships on majors like astrophysics and the like? That is, if you don't mind, of course. Thanks for replying, I really love your videos!😊👍
@3:34:29 ... one thing ought to have been mentioned here:
The red laser would not arrive at the standing viewer at any speed other than c.... BUT, if the driver is firing that laser from a car moving 0.9999999999 c, the observer wouldn't see the laser's beam anyway. The laser's light would be blue-shifted into hard gamma, and the flash would make the observer's entire skull and its contents inoperable and very swiftly dead.
Yeah, it's certainly blueshifted. However, I think the stationary observer measures lower laser oscillator frequency inside the car, while the driver measures normal clock frequency. Both measure shorter distance b/w the stationary observer and the car. These cycles must fit into that distance. However, I think the stationary guy could see more luminous laser (and car) due to relativistic lensing. Due to this relativistic lensing the car guy must see his laser photons hitting the stationary guy even after he has driven past the stationary guy.
Close: cycles (e.g. phase) is Lorentz invariant: all observers agree, so is the number of photons in a laser beam. The only problem is, when analyzing a length of laser at the same time in different frames, you have to include the relativity of simulatenaety, a finite length at an instance in the car frame, spans time in the stationary frame. Sometimes you just have to do the Lorentz transform
Instant favourite channel. Watching all the videos. Great commutative skills - well served knowledge with lots of details.
If your course is introductory (including black holes, gravitational waves?), what is the main deal then? what are the more advanced topics?
The more advanced topics would be mathematics-based, as well as demonstrating data-collection and interpretation methods. Basically, this course just gets you the current paradigm, but doesn’t get you ready to be a researcher. It does get you ready to be knowledgeable about what you are seeing in your personal telescope and how to understand public talks and what astronomers are talking about.
Awesome lecture. Thanks for your efforts!
I’m actually really proud of this particular video series. It’s a topic that’s usually skipped over by public speakers. It’s also something that’s very hard to communicate without using math and a lot of explanation.
@@JasonKendallAstronomer Thank you for sharing this with us. You’re making the world a smarter place!
Great explaination. Thanks!
Gold standard....thank you for your gift
My pleasure. Not sure why this compilation doesn't get more hits. I guess there's a lot of fud out there about gravity.
These lectures are great, It would be nice to know the prerequisites before watching the lectures. Thank you.
Start from the first in the series.
thank you...!!! love your talks...!!!
Truly well done lectures!! I’m only about a third the way through and can honestly say there’s no difference between these and ones I wasted thousands of dollars on in University…… 😒
except maybe I'm not wasting your time or money?
Amazing lectures. I loved these! KEEP THEM COMING!!!
Thank you! Will do!
I will be waiting for your Talks
thank you ♥️
Waoo..... Straight away 4 hour😱
Fantastic videos, really enjoying this, thanks!
Excuses Excuses :-)
Tralfamadorian Teacher: Joey. Why are you late for school?
Joey: Ummm... Well. I was running as fast as I could. But I couldn't run faster than the speed of light.
Isn’t the “the speed of late”?
@@JasonKendallAstronomer Ha ha. Yes. In Tralfamadoria the speed of late is a LOT slower than the speed of light.
Actually, I'd've thought it was a lot faster?
@@JasonKendallAstronomer Yes. When Joey is late, he runs at the speed of late. And he has even more excuses.
Tralfamadorian Teacher: Joey. Where is your homework? Did your dog eat it?
Joey: Umm... No. It fell into the black hole.
🙏
What crazy elevator emergency brake takes 30 stories to stop the fall? If the cable broke when you were at the 25th floor you wouldn't have an amusing story, you'd have a splat! YOU lucky! Art
It wasn't a good ride that day....
Si, I see C. 😂😂😁
Perhaps Stick Man could’ve been talking to his sister Cici?
@@JasonKendallAstronomer Hey, I didn't notice this for a week! By the way, I am from Ethiopia and I am currently trying to apply for international universities (Under Graduate). Do you know any universities in the U.S. or any other country that give scholarships on majors like astrophysics and the like? That is, if you don't mind, of course.
Thanks for replying, I really love your videos!😊👍
I really don’t understand this. But it seems like a happy sentiment