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  #281  
Old 15 March 2018, 02:33 AM
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Quote:
Originally Posted by Seaboe Muffinchucker View Post
Everything casts a shadow, unless the light is come from all directions. You just don't see the shadows because they're small and directly beneath you....
If I put a pop can on the ground on the equator on the equinox it will not cast a shadow because the place where a shadow would be is taken up by the footprint of the pop can.

But, you are correct, that if one were to pick said pop can up from the ground, there would be a perfectly round shadow beneath it.
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  #282  
Old 15 March 2018, 02:53 AM
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The ground under the can would be in shadow. Unless shadow is like noise in a forest.
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  #283  
Old 15 March 2018, 03:16 AM
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Okay, how about it casts no visible shadow?
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  #284  
Old 15 March 2018, 01:52 PM
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Quote:
Originally Posted by Beachlife! View Post
If I put a pop can on the ground on the equator on the equinox it will not cast a shadow
Additional nitpick: you forgot to specify 'at noon'.

(Or, I suppose, at night, unless the moon's out and not new -- )
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  #285  
Old 15 March 2018, 03:23 PM
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Quote:
Originally Posted by Beachlife! View Post
Okay, how about it casts no visible shadow?
What if there's an ant under it?
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  #286  
Old 15 March 2018, 04:24 PM
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If I go down into my basement am I in the shadow of my house? If I break through the floor and start digging am I then in the shadow of the house. Is darkness always a shadow? Can one be under multiple shadows? I have so many questions now...
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  #287  
Old 15 March 2018, 06:19 PM
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Who knows what evil lurks in the hearts of men? The Shadow do!

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  #288  
Old 15 March 2018, 08:51 PM
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Quote:
Originally Posted by Beachlife! View Post
If I go down into my basement am I in the shadow of my house? If I break through the floor and start digging am I then in the shadow of the house. Is darkness always a shadow? Can one be under multiple shadows? I have so many questions now...
It get worse, an object at solar noon still casts a shadow since the sunlight rays aren't parallel and are diverging after they pass the top of the object, creating a shadow.
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  #289  
Old 15 March 2018, 10:22 PM
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The key word is 'cast', which means to project. If the object isn't projecting the shadow onto another surface then it isn't called casting a shadow.
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  #290  
Old 16 March 2018, 06:41 PM
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Quote:
Originally Posted by ganzfeld View Post
The key word is 'cast', which means to project. If the object isn't projecting the shadow onto another surface then it isn't called casting a shadow.
You can't project a shadow. A shadow is nothing and you can't project nothing. You can project light but you can't project "not light".

All opaque objects in the presence of a light source have a shadow. (Insert caveats about the object being significantly larger than the wavelength of light.) The earth has a shadow. Whether that shadow falls on another object or not is irrelevant to the existence of the shadow.


Are you really sure the refrigerator light goes off when you close the door?
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  #291  
Old 16 March 2018, 06:44 PM
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A shadow is not an object that obeys the Heisenberg Uncertainty Principle (at least not at human length scales). If there is an object, and a cat, and the object is on the table, then the cat knocks it off the table. The object has a shadow the entire time and the cat always survives.
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  #292  
Old 16 March 2018, 07:07 PM
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Quote:
Originally Posted by jimmy101_again View Post
If there is an object, and a cat, and the object is on the table, then the cat knocks it off the table.
Finally! Something in this discussion that's definitely and verifiably true!

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  #293  
Old 16 March 2018, 08:07 PM
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If the world were flat, cats would have knocked everything off it by now.
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  #294  
Old 16 March 2018, 08:23 PM
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Does a rapper at the equator at noon still throw shade?
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  #295  
Old 18 March 2018, 03:56 AM
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I took my dad up to Portland today because he's going on a trip with my sister and it was cheaper for him to fly out of Portland but back to Eugene so he left his car at the Eugene airport and needed a lift the rest of the way.

While I was in town, I decided to go to the zoo, which I haven't done in a while.

It was fun, but the Oregon Zoo is doing extensive remodels and one of the end results is that they've closed the Visayan warty pig exhibit. I love seeing the warty pigs, and was disappointed that they weren't on display.

But even worse, they've completely closed their Amazon Flooded Forest exhibit and and sent all the animals to other zoos because they're converting it into more space for their primates. More space for primates is good, but the Flooded Forest was my favorite exhibit there!
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  #296  
Old 18 March 2018, 11:52 AM
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Quote:
Originally Posted by GenYus234 View Post
Does a rapper at the equator at noon still throw shade?
On equinox or on another day?
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  #297  
Old 18 March 2018, 07:43 PM
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My dad ordered a birthday present for me online, except instead of having it shipped to me he chose the "pick up in store" option (presumably because he didn't want to pay for shipping). So in order to receive my gift I have to go make a trip to the store that I wasn't planning on making.
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  #298  
Old 18 March 2018, 10:36 PM
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WildaBeast, reminds me of the time quite a few years ago when my uncle in Italy, who had just discovered faxes (they were relatively new at the time), decided to send me one for my birthday.

He forgot to check whether I had any way to get the thing; and the only way I did have was to go pick it up in town, six miles away. He called my mother to find out how I liked it; and my anticipated comfortable day at home wound up getting a trip to town jammed into it.
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  #299  
Old 19 March 2018, 05:35 PM
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Quote:
Originally Posted by jimmy101_again View Post
A shadow is not an object that obeys the Heisenberg Uncertainty Principle (at least not at human length scales). If there is an object, and a cat, and the object is on the table, then the cat knocks it off the table. The object has a shadow the entire time and the cat always survives.
Until you throw it out the window, forgetting you live on the 20th floor.
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  #300  
Old 19 March 2018, 05:42 PM
jimmy101_again jimmy101_again is offline
 
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Quote:
Originally Posted by Dr. Winston O'Boogie View Post
Until you throw it out the window, forgetting you live on the 20th floor.
You shouldn't throw a cat out a 20th floor window.
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