curves_surfaces : Message: reflecting disks photo gallery

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reflecting disks photo gallery

Message #48 of 84 |

just created this page:
http://xahlee.org/Whirlwheel_dir/reflecting_disks/reflecting_disks.html

a photo gallery of reflecting disks. (radio dishes, solar dishes)

Xah

Sat Apr 23, 2005 5:03 pm

Xah Lee <xah@...>

Online Now

Message #48 of 84 |

Expand Messages	Author	Sort by Date
just created this page: http://xahlee.org/Whirlwheel_dir/reflecting_disks/reflecting_disks.html a photo gallery of reflecting disks. (radio dishes, solar...	Xah Lee p0lyglut	Apr 23, 2005 5:03 pm
There was a toy that had a virtual pig floating in air. There was an actual pig at the base of the toy and his virtual image was at the focus of a parabolic...	Hop David hollister_david	Apr 23, 2005 8:31 pm
yes i remember seeing that in Nature store. I thought i saw it on wikipedia too... but anyway they have a good article on mirage ...	xah lee p0lyglut	Apr 24, 2005 3:32 pm
Better to say Reflector dishes instead of reflecting disks. The TV dish receiver is not necessarily parabolic, since the focus is below the center of the dish...	Narasimham Gudipaty glnarasimham	Apr 24, 2005 2:50 pm
... I took your advice. ... if that means the surface is a surface of revolution. If so, the focus must be in the center. But that TV disk has the receiving...	Xah Lee p0lyglut	Apr 24, 2005 6:10 pm