Timeline for Why is there a "blue hour" after the "golden hour"?
Current License: CC BY-SA 4.0
8 events
| when toggle format | what | by | license | comment | |
|---|---|---|---|---|---|
| Jan 4, 2020 at 22:46 | comment | added | Ruslan | Full half year is all the range from dusk to dawn. Blue hour is only several days to weeks of this period. I haven't observed actual polar night, but, living in Saint-Petersburg (Russia), which is at 60°N, I'm quite familiar with one twilight transforming into another in the summer. This is another instance of very long blue hours. | |
| Jan 4, 2020 at 22:30 | comment | added | Jokela | @Ruslan Oh, but that lasts a full half year if you like. As I Observed, we are not really talking about same issues here, which makes the conversation meaningless. Yes, the sky is blue also in the night. That just isn't the blue moment. I have actually even lived north from polar circle as having a leisure cottage there. Have you personally observed Polar night? Polar day? Northern lights? Blue moment? IMO it's almost non existent in the Central Europe. | |
| Jan 4, 2020 at 22:22 | comment | added | Ruslan | Just see this: polar night. At the extreme, it lasts for the whole day. In the beginning of winter, until winter solstice comes, all you have is twilight of varying depth (which is, of course, also whole-day-long). | |
| Jan 4, 2020 at 22:19 | comment | added | Jokela | @Ruslan Multiple hours? I dont hold my breath while waiting your link for that. Here is the wiki en.wikipedia.org/wiki/Blue_hour and here some more earthsky.org/earth/what-is-the-blue-hour I am done with you. Bye. | |
| Jan 4, 2020 at 22:00 | comment | added | Ruslan | Blue hour lasts tens of minutes to multiple hours depending on latitude. Nowhere does it last several seconds. Moreover, numerical simulations neglecting atmospheric refraction successfully reproduce this phenomenon, which once again demonstrates that refraction doesn't play any significant role here. | |
| Jan 4, 2020 at 21:56 | comment | added | Jokela | @Ruslan Well, Yes, that's why these phenomenons are lasting only short time. Ie. the Green flash of sun is only seconds. Yet when you get high latitudes, these times gets longer. I am from Finnland and there this "Blue moment" is so remarkably long, and is used even inproduct brands and in their TV-commercials (it's still not an hour, it's just a moment) youtube.com/watch?v=dUsdpMyr2_k | |
| Jan 4, 2020 at 21:36 | comment | added | Ruslan | Atmospheric refraction is pretty negligible when discussing the colors of the sky. Even more so the dispersion of refractive index. | |
| Jan 4, 2020 at 20:44 | history | answered | Jokela | CC BY-SA 4.0 |