Go Back   Physics Help Forum > College/University Physics Help > Advanced Optics

Advanced Optics Advanced Light and Optics Physics Help Forum

Reply
 
LinkBack Thread Tools Display Modes
Old Sep 27th 2017, 01:14 AM   #1
Junior Member
 
Join Date: Sep 2017
Posts: 1
Air refraction as function of TEMPERATURE

I have been looking for a chart/function but couldnt find.

I need it to do studies on a Schlieren set-up, which relies on the difference of density, thus variations of the air refraction, to make air flow visible.

Hereby I attach a video that explains it better



So, I would appreciate if anybody has such information: Air refraction ~ Temperature (standard Pressure conditions)
zaumo is offline   Reply With Quote
Old Sep 27th 2017, 09:29 AM   #2
Senior Member
 
Join Date: Apr 2015
Location: Somerset, England
Posts: 688
Surely its not going to be a function of temperature alone?

The humidity will also change with temperature, and this will in turn affect the refractivity.
studiot is offline   Reply With Quote
Old Sep 27th 2017, 12:29 PM   #3
Senior Member
 
Woody's Avatar
 
Join Date: Jun 2016
Location: England
Posts: 338
I am not sure that there is a significant change of refraction with temperature at standard pressure, however there is a change with density.

Naturally (if pressure is constant) changes in temperature will cause changes in density, but it is the changes in density that are showing on the Schlieren.

So you need to look for the effect of air density on the refractive index;
then look, separately, at the effect of temperature on the air density.
__________________
~\o/~
Woody is offline   Reply With Quote
Old Sep 28th 2017, 04:25 PM   #4
Senior Member
 
Join Date: Apr 2015
Location: Somerset, England
Posts: 688
My Kaye and Laby publishes refractive index data for air including some formulae for the temperature variation.

They have an online version these days.
studiot is offline   Reply With Quote
Reply

  Physics Help Forum > College/University Physics Help > Advanced Optics

Tags
air, function, refraction, schlieren, temperature



Thread Tools
Display Modes


Similar Physics Forum Discussions
Thread Thread Starter Forum Replies Last Post
function of time juggalomike Kinematics and Dynamics 4 Jan 28th 2010 03:58 PM
function of time juggalomike Advanced Mechanics 2 Jan 15th 2010 05:34 AM
Normalization of a wave function Fizban Quantum Physics 2 Dec 11th 2009 10:33 AM
Transfer function moisesbr Kinematics and Dynamics 1 Oct 25th 2009 03:04 PM
local Green's function nnnnn Atomic and Solid State Physics 1 Oct 4th 2009 01:51 AM


Facebook Twitter Google+ RSS Feed