General Information

Serial #

N/A

Part Number

1

Total Parts

1

AKA

N/A

Patents

N/A

General Description

Unknown

Dimensions

Note: These reflect the general size for storage and are not necessarily representative of the object's true dimensions.

Length

32.0 cm

Width

37.0 cm

Height

43.1 cm

Thickness

N/A

Weight

N/A

Diameter

N/A

Volume

N/A

Lexicon

Group

Physics

Category

Mechanics

Sub-Category

N/A

Manufacturer

AKA

Unknown

Country

Unknown

State/Province

Unknown

City

Unknown

Context

Country

Unknown

State/Province

Unknown

Period

Unknown

Canada

Probably used in Canadian classrooms/labs to demonstrate the location of stress points of a piece of plastic/plexiglass.

Function

Used to demonstrate stress applied to plexiglass.

Technical

An example of a teaching tool using the phenomenon of photoelasticity. Light from inside the box passes through a polarizing lens producing polarized light. Birefringence is a property by virtue of which a ray of light passing through a birefringent material experiences two refractive indices. Photoelastic materials exhibit the property of birefringence only on the application of stress. When a ray of plane polarised light is passed through a photoelastic material, it gets resolved along the two principal stress directions and each of these components experiences different refractive indices. The difference in the refractive indices leads to a relative phase retardation between the two component waves. The two waves are then brought together in a polariscope. Optical interference takes place and we get a colourful fringe pattern, which depends on relative retardation. Thus studying the fringe pattern one can determine the state of stress at various points in the material.

Area Notes

Unknown

Details

Markings

N/A

Missing

N/A

Finish

Unknown

Decoration

N/A