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# Difference between uniaxial and biaxial crystals?

Updated: 9/28/2023

Dayesh100

Lvl 1
9y ago

The difference between a uniaxial and a biaxial crystal is that a uniaxial crystal has 1 optic axes, while a biaxial crystal has 2 optic axes.

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Q: Difference between uniaxial and biaxial crystals?
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### What are the optical character?

There are two types uniaxial or biaxial.

### Is the hip a biaxial joint?

No, it's a multi-axial synovial type of a ball-and-socket joint.

### What is triaxial stress?

That is stress in three dimensions. Biaxial stress is in two dimensions. Triaxial stress has normal and shear stresses along each of three planes. Most beams can be analyzed with uniaxial stress; plates with biaxial; solids with triaxial

### What is uniaxial movement?

Uniaxial movement refers to motion that occurs in only one direction or along a single axis. In the context of biology or anatomy, uniaxial movement can refer to the motion of a joint that allows movement in only one plane or direction, such as flexion and extension at the elbow joint. This is in contrast to biaxial or multiaxial movement, which involve motion in multiple planes or around multiple axes.

### What do you mean by biaxial crystal?

Certain substances will split a ray of light into two slightly different paths by polarisation. If a crystal transmits light without splitting it in this way when the light is incident on the crystal in only one direction then the crystal is said to be uniaxial. If light is transmitted when it is incident in either of two directions then the crystal is said to be biaxial. Please see the links.

### What is a bisectrix?

A bisectrix is the line bisecting the angle between the optic axes of a biaxial crystal.

yes

Yes

### What joints are biaxial hinge joints?

Biaxial joints allow for movement in two planes or axes. A common example of a biaxial joint is the wrist, which allow for movement side to side, and also allows for movement up and down. It can be difficult to determine whether a joint is biaxial or multiaxial, because when the biaxial joint moves in both directions at the same time, it appears to have the multiaxial quality of being able to move in any plane or axes.

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### What are the types of joints found in thumb?

The thumb consists of three types of joints: the carpometacarpal joint (where the thumb meets the wrist), the metacarpophalangeal joint (where the thumb meets the hand), and the interphalangeal joint (between the two thumb phalanges). These joints provide flexibility and range of motion to the thumb.