Astronomy - Measuring Distance, Size, and Luminosity (22 of 30) Radial Velocity of Stars
HTML-код
- Опубликовано: 9 апр 2014
- Visit ilectureonline.com for more math and science lectures!
In this video I explain radial velocity of stars (blue shift and red shift).
You are an actual saint, thank you for your amazing explanations, they've helped me so much
No no. Not a saint. Just blessed that we are able to help students around the world.
Thank you so much sir, I'm getting prepared for astrophysics olympics and your videos helps me a lot!!!❤😊
Glad you found our videos. All the best on your competition.
You've helped me so much with my astronomy course. Thank you, Michel!
You are welcome. Glad you found our videos. 🙂
Very helpful for my project. Thank you for these lectures!
You are a magician!
Awesome videos sir! Can you please also do a video on the rotational curve of galaxies and how rotational velocities of distant stars in milky way were found. Particularly in the context of Vera Rubin's observations of 1970s.
Yes! thank you!
Thanks
Welcome
Any way to measure the direction of travel as seen from the telescope. This tells us the absolute +/- value of the radial velocity, right? But we don't know if it's coming right at us slowly or at some angle and miss us, as in the diagram.
That is correct, we can only measure the radial velocity.
Just a random 16 year old wanting to learn something new
This is a good channel to do that.
What will the formula be if the celestial body is moving at high speed ? ( Comparable to light)
This is essentially the Doppler Shift formula....at relativistic speeds, the equation is :
nu=nu0×sqrt (c-u)/(c+u)...this is for redshift...for blueshift we take the reciprocal of the term inside the square root....
Hope it helps...😄😄
Can u please help me how to derive the v=c×∆lambda/lambda equation?
This is the Doppler effect equation. (The exact same method is used to calculate the Doppler shift in sound).
@@MichelvanBiezen thank you 😊