Understanding through Discussion


Welcome! You are not logged in. [ Login ]
EvC Forum active members: 66 (9049 total)
96 online now:
AZPaul3 (1 member, 95 visitors)
Newest Member: Wes johnson
Upcoming Birthdays: Coragyps
Post Volume: Total: 887,675 Year: 5,321/14,102 Month: 242/677 Week: 47/54 Day: 0/4 Hour: 0/0


Thread  Details

Email This Thread
Newer Topic | Older Topic
  
Author Topic:   Science Questions
Taq
Member
Posts: 8488
Joined: 03-06-2009
Member Rating: 7.4


Message 7 of 10 (833238)
05-18-2018 4:19 PM
Reply to: Message 1 by dwise1
05-18-2018 2:18 AM


dwise1 writes:


2. Physics question. There's a rotating exhaust vent which is very shiny, highly reflective. At night it seems to have a prismatic effect as it takes yellow and white street light light and generates a rainbow of colors -- mainly we see glints of red and blue along with white. Is there an explanation for that effect?

If you are talking about the metal itself then this is caused by an oxide layer on the surface of the metal. As you heat metals they can oxidize, especially on the surface. Light refracts differently off of the two substances causing refraction in the same way that gasoline in water causes the same rainbow effect.

Edited by Taq, : No reason given.


This message is a reply to:
 Message 1 by dwise1, posted 05-18-2018 2:18 AM dwise1 has not yet responded

  
Taq
Member
Posts: 8488
Joined: 03-06-2009
Member Rating: 7.4


(1)
Message 9 of 10 (833250)
05-18-2018 5:03 PM
Reply to: Message 8 by dwise1
05-18-2018 4:27 PM


Re: The Prismatic Exhaust Thingee
dwise1 writes:

It is the wind that's spinning those exhaust vents. The effect is in effect all night long -- maybe it's happening in the daytime too, but we cannot see it then. Also, the running of heat or A/C is apparently very strictly controlled and restricted in Italy and now is not the time of year that you would get either. I have no clue what could possibly be getting vented up that exhaust, but nothing could possibly be running all night long, night after night.

I don't know if this is the effect you are seeing, but black dots spinning around on a disc can produce the illusion of color. I think it has to do with the "refresh rate" of the photosensitive chemicals in your eyes.

http://www.waynesthisandthat.com/fechner%20colors.html


This message is a reply to:
 Message 8 by dwise1, posted 05-18-2018 4:27 PM dwise1 has responded

Replies to this message:
 Message 10 by dwise1, posted 05-19-2018 2:03 AM Taq has not yet responded

  
Newer Topic | Older Topic
Jump to:


Copyright 2001-2018 by EvC Forum, All Rights Reserved

™ Version 4.0 Beta
Innovative software from Qwixotic © 2021