Difference between revisions of "Talk:2926: Doppler Effect"
TheusafBOT (talk | contribs) (Created by theusafBOT: talk page for 2926) |
|||
| (5 intermediate revisions by 4 users not shown) | |||
| Line 1: | Line 1: | ||
<!--Please sign your posts with ~~~~ and don't delete this text. New comments should be added at the bottom.--> | <!--Please sign your posts with ~~~~ and don't delete this text. New comments should be added at the bottom.--> | ||
| + | Honestly, this is one of my favorite ones yet, [[User:Apollo11|Apollo11]] ([[User talk:Apollo11|talk]]) 18:21, 29 April 2024 (UTC) | ||
| + | :I'm not always a big fan of Miss Lenhart comics, but I agree this one is good. [[User:Barmar|Barmar]] ([[User talk:Barmar|talk]]) 18:39, 29 April 2024 (UTC) | ||
| + | I think there might be some confusion in the explanation. It suggests that red shift occurs because of space expansion, not because of relative motion between the light source and observer. My understanding is that there IS relative motion between the light source and observer BECAUSE of expanding space. [[Special:Contributions/172.68.22.151|172.68.22.151]] 19:54, 29 April 2024 (UTC) | ||
| + | :Edit - There appears to be a "just" in there that I missed, changing the meaning of the sentence somewhat. Never mind. [[Special:Contributions/172.68.22.151|172.68.22.151]] 19:58, 29 April 2024 (UTC) | ||
| + | The bit about the Doppler effect being similar to a bullet fired from a moving car is simply incorrect. That's vector addition of velocities. Sound traveling from a source is going to travel at the speed of sound in the medium, and the only addition of velocities would be to the extent that the car is moving the air around it. Also, the Doppler effect doesn't make sounds louder, that's simply a function of the distance between you and the source changing, independent of velocity. Edited the text accordingly. [[Special:Contributions/172.70.42.213|172.70.42.213]] 20:00, 29 April 2024 (UTC) | ||
| + | This comic seems to be poor nerd sniping for explainxkcd to get into a long explanation why galaxies are red ... --[[Special:Contributions/172.70.247.172|172.70.247.172]] 20:08, 29 April 2024 (UTC) | ||
Revision as of 20:08, 29 April 2024
Honestly, this is one of my favorite ones yet, Apollo11 (talk) 18:21, 29 April 2024 (UTC)
- I'm not always a big fan of Miss Lenhart comics, but I agree this one is good. Barmar (talk) 18:39, 29 April 2024 (UTC)
I think there might be some confusion in the explanation. It suggests that red shift occurs because of space expansion, not because of relative motion between the light source and observer. My understanding is that there IS relative motion between the light source and observer BECAUSE of expanding space. 172.68.22.151 19:54, 29 April 2024 (UTC)
- Edit - There appears to be a "just" in there that I missed, changing the meaning of the sentence somewhat. Never mind. 172.68.22.151 19:58, 29 April 2024 (UTC)
The bit about the Doppler effect being similar to a bullet fired from a moving car is simply incorrect. That's vector addition of velocities. Sound traveling from a source is going to travel at the speed of sound in the medium, and the only addition of velocities would be to the extent that the car is moving the air around it. Also, the Doppler effect doesn't make sounds louder, that's simply a function of the distance between you and the source changing, independent of velocity. Edited the text accordingly. 172.70.42.213 20:00, 29 April 2024 (UTC) This comic seems to be poor nerd sniping for explainxkcd to get into a long explanation why galaxies are red ... --172.70.247.172 20:08, 29 April 2024 (UTC)
