Help Keep Boards Alive. Support us by going ad free today. See here: https://subscriptions.boards.ie/.

https://www.boards.ie/group/1878-subscribers-forum

Private Group for paid up members of Boards.ie. Join the club.

Hi all, please see this major site announcement: https://www.boards.ie/discussion/2058427594/boards-ie-2026

What is a linear medium?

23-11-2011 09:57PM

#1

Smythe

Registered Users, Registered Users 2 Posts: 434 ✭✭

Join Date: March 2010

Posts: 232

What is a linear medium?

0

Comments

#2 24-11-2011 02:35AM

FarmerGreen

Registered Users, Registered Users 2 Posts: 1,134 ✭✭✭

Join Date: May 2008

Posts: 986

Normal optical glass ie BK7.

0
#3 24-11-2011 04:53AM

Smythe

Registered Users, Registered Users 2 Posts: 434 ✭✭

Join Date: March 2010

Posts: 232

FarmerGreen wrote: »

Normal optical glass ie BK7.

So, definition-wise, does it mean that different waves at any particular point in the medium can be superposed?

0
#4 24-11-2011 05:55PM

rgunning

Registered Users, Registered Users 2 Posts: 217 ✭✭

Join Date: November 2004

Posts: 186

One where the polarization is linear (i.e. proportional and parallel) with the electric field.

i.e.

P = k.e.E

where P is the polarization, E is the electric field, e is the permittivity of free space and k is the electric susceptibility of the medium.

I think.

0
#5 25-11-2011 03:08AM

FarmerGreen

Registered Users, Registered Users 2 Posts: 1,134 ✭✭✭

Join Date: May 2008

Posts: 986

Bit technical, so non linear is like the frequency doublers they use to get from IR to visible ? Not graded index?

0