Questions tagged [sun-rays]
The sun-rays tag has no usage guidance.
14
questions
1
vote
2
answers
248
views
Do the Sun's rays get focused at or near the L1 Lagrangian point?
I have seen so many schematic pictures of eclipses (solar and lunar), and in all of them, the Sun's rays are focused at a specific point (left of the Earth in lunar eclipses and a slightly left of the ...
- 985
3
votes
0
answers
49
views
Could the timing of the oxygen spike on Mars be used to determine if photosynthesis is responsible?
I am wondering if the timing of the oxygen spike on Mars could be used to determine if photosynthesis is the source (which would be another indication of life on Mars), or if it is purely heat related?...
- 4,355
2
votes
1
answer
125
views
How to determine the formula to calculate this position of reflected Sun?
I created a geometrical simulation of how the Sun is reflected on a wall along the day and along the year, using Geogebra:
https://www.geogebra.org/classic/dckhbc8h
Playing with parameters, I found ...
- 543
2
votes
1
answer
58
views
Why is the solar wind most powerful near the heliosphere?
I've read this article, titled, "Voyager Mission Finds a New Type of Electron Burst at The Edge of Our Solar System". They state that,
Carried to the fringes of our Solar System by the ...
- 243
2
votes
1
answer
562
views
How do the sun's light rays come to the world?
How do they come to the world? One of my friends who is a flat earther told me about how the rays seem to gather at one point, which sort of proves that the sun is close to us and not very big, in his ...
- 23
1
vote
0
answers
21
views
Does the perceived colour of the sun change based on the observer's location? [duplicate]
A friend of mine visited Panama and claimed the sun appeared whiter. He's very color conscience and says certain shades of red looked different there. Could this be due to the position of the sun?
- 11
1
vote
1
answer
41
views
Does the observed color of the sun change based on the observer's location?
A friend of mine visited Panama and claimed the sun appeared whiter. He's very color conscience and says certain shades of red looked different there. Could this be due to the position of the sun?
- 11
2
votes
2
answers
94
views
How should I think about sunlight for the purposes of analyzing the angles it makes w/ earth?
Most diagrams I see of sunlight look like something like this:
.
They show that for basic geometric analyses, the sun's radiation can be thought of as 'thin lines' that strike earth. Further, at an ...
- 21
0
votes
1
answer
329
views
Sunrise - from earth - sun position or when sun rays reaches earth?
Time for the sun rays to reach earth is approximately 8 mins.
If time of the sun rise is 7:30 - which time is this? Time when sun rays reaches earth or time when earth and sun comes into correct ...
- 103
7
votes
3
answers
1k
views
Solar visible light spectrum
So the visible light from stars can be used to identify the elements in that star by looking at the spectral emission lines and comparing those lines to emission lines of various elements (and their ...
- 381
4
votes
1
answer
137
views
Why is it not always light? [duplicate]
Hopefully this is not a silly question, but I was wondering why earth is not always in the light (and any other planet for that matter). I mean, we have billions of stars just in our galaxy that all ...
- 795
0
votes
1
answer
1k
views
Is there a difference between the solar elevation angle and sun declination?
I need to use the sunrise equation but one of the variables is the sun declination. On the other hand, I have the values for solar elevation angle that I need. Are they the same thing?
- 197
8
votes
1
answer
4k
views
How can I calculate the time between sunset and actual darkness?
I would like to know the time it takes to go from sunset to dark based on GPS location.
In addition, ideally I would also like to have a formula that determines the percentage of sunlight at each ...
- 197
-4
votes
1
answer
224
views
If sun-rays also contain any X-rays why we can't see the inner organs of the human body through these rays? [closed]
Nobody has been able to find an answer how anybody may be able to see the inner organs of the human body as Natalya Demkina is able to see. In this context, I want to mention that the same way as we ...
- 745