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4hv.org :: Forums :: Electromagnetic Radiation
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Elasto-optical polarization experiments

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Physikfan
Sun Oct 30 2016, 06:14PM
Physikfan Registered Member #60240 Joined: Mon May 16 2016, 07:01PM
Location:
Posts: 304
A simple experiment setup with polarization filters, plastic ring and stress ring for elasto-optical polarization experiments
P1750102400

Here are the results:

Plastic ring under stress, polarizers parallel
SP1750142trim SHPX001

Plastic ring under stress, polarizers crossed
SP1750127trim SHPX001

Bar1 under stress polarizers crossed
SP1750156trim SHPX001

Bar2 under stress polarizers crossed
SP1750158trim SHPX001

Bar2 under stress polarizers parallel
SP1750159trim SHPX001

Literature:

Hecht Optics
Tipler Physics
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Physikfan
Sun Oct 30 2016, 06:26PM
Physikfan Registered Member #60240 Joined: Mon May 16 2016, 07:01PM
Location:
Posts: 304
Elasto-optical polarization experiments
Additional pictures:

Simple optical setup with slide viewer, first polarizer, sample and second polarizer:
P1750165 SHPX001

Plastic bar under stress:
P1750168 SHPX001

Plastic ring under stress
P1750122 SHPX001

P1750145400
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Physikfan
Sun Oct 30 2016, 06:41PM
Physikfan Registered Member #60240 Joined: Mon May 16 2016, 07:01PM
Location:
Posts: 304
More elasto-optical polarization experiments:

Zunächst gekreuzte, danach parallele Orientierung des Analysators (zweites Filter) relativ zum ersten Filter

Plastic bar under higher pressure, polarizers crossed
P1750246P1750246400x242P1750246400x242

Plastic bar under higher pressure, polarizers parallel
P1750249P1750249400x269P1750249400x269


Thick plastic bar under pressure, polarizers crossed
P1750242P1750242400x313P1750242400x313

Thickk plastic bar under pressure, polarizers parallel
P1750244P1750244400x290P1750244400x290
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Sulaiman
Sun Oct 30 2016, 06:47PM
Sulaiman Registered Member #162 Joined: Mon Feb 13 2006, 10:25AM
Location: United Kingdom
Posts: 3140
my local science museum had exhibits like those,
I spent days looking at ordinary objects through polarisers.
From memory, hard transparent plastic rulers and pens were best.
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Physikfan
Sun Oct 30 2016, 07:53PM
Physikfan Registered Member #60240 Joined: Mon May 16 2016, 07:01PM
Location:
Posts: 304
Hi Sulaiman

Thanks for your comment.
Is the science museum in London your local science museum?

Regards

Physikfan

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Sulaiman
Mon Oct 31 2016, 01:45AM
Sulaiman Registered Member #162 Joined: Mon Feb 13 2006, 10:25AM
Location: United Kingdom
Posts: 3140
It no longer exists; Birmingham museum of Science and Industry
Link2 ... many childhood/youth visits
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