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Online timterroo

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Sun rays
« on: August 31, 2018, 08:20:33 PM »
I've heard the argument used that if the sun is as far away as RE says then the light rays should be parallel with each other, not angled as they are in this photo.

I'm not sure I've heard that argument in these forums, so I am curious what tfes says about this.

This image shows what I'm referring to.


https://m.imgur.com/a/EMes10o
"noche te ipsum"

"If you can't explain it simply, you don't understand it well enough."  - Albert Einstein

Re: Sun rays
« Reply #1 on: August 31, 2018, 08:38:44 PM »
It's come up a few times. Search 'Crepuscular Rays' in the forums if you wish to see some of the discussions. Really though the location those rays point to the sun being doesn't work for EITHER FE or RE, so it's an instance were both basically agree it's simply a perspective effect or similar.

HorstFue

Re: Sun rays
« Reply #2 on: August 31, 2018, 08:56:07 PM »
Yes, "crepuscular" is the search term which will give you some results.

Meanwhile a have a similar "grounded" example for you, not so striking, as the length of the field is limited.
https://il9.picdn.net/shutterstock/videos/11234123/thumb/1.jpg
(France, Lavender fields)
Reason is: Perspective.
« Last Edit: August 31, 2018, 09:14:49 PM by HorstFue »

Offline uldics

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Re: Sun rays
« Reply #3 on: August 31, 2018, 09:26:26 PM »
The rays are practically parallel due to Sun being very far. Here is a very simple explanation: http://www.atoptics.co.uk/atoptics/rayform.htm

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Online timterroo

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Re: Sun rays
« Reply #4 on: September 01, 2018, 12:26:32 AM »
Yes, "crepuscular" is the search term which will give you some results.

Meanwhile a have a similar "grounded" example for you, not so striking, as the length of the field is limited.
https://il9.picdn.net/shutterstock/videos/11234123/thumb/1.jpg
(France, Lavender fields)
Reason is: Perspective.

The rays are practically parallel due to Sun being very far. Here is a very simple explanation: http://www.atoptics.co.uk/atoptics/rayform.htm

Thank you both. The explanation makes perfect sense for either FE/RE. I like the picture of the rows of heather (or whatever it is). That is a good way to visualize and understand the perspective.
"noche te ipsum"

"If you can't explain it simply, you don't understand it well enough."  - Albert Einstein