All Questions
5
questions
2
votes
1
answer
149
views
How distant is the horizon on Venus?
Strong atmospheric refraction can make the horizon on Venus much closer than expected, but how close is it? My naive calculation is very different from reported observations.
A source cited in How ...
- 11.7k
0
votes
2
answers
87
views
Can we witness Optical illusion in which sun appears to set in mid sea than at horizon?
I was searching for optical illusions and came across a video on youtube where sun seems to set in the mid of sea instead of setting at the horizon? Can anyone please explain how this illusion takes ...
- 1,357
0
votes
1
answer
188
views
What type of mirage is this?
I am very new to the world of mirages and would like some information as to the type of mirage in this picture which I took this morning. It is the cargo ship African Kalmia which passed my location ...
- 39
1
vote
1
answer
1k
views
Ray tracing through a plane where the refractive index is a function of the distance from the origin
Suppose that in a plane parallel to the yz-plane, the index of refraction $n$ is a function of the distance from the origin, $R$, i.e., $n = n(R)$.
We know that (e.g., http://aty.sdsu.edu/explain/...
- 171
3
votes
0
answers
384
views
False sunset and false sunrise time estimation
False sunset and false sunrise are described .
Here is a sample day rise and set time according to AccuWheather site and calculated value of sunrise and sunset in my country. Could you please help ...
- 163