Total internal reflection

Critical angle

When the angle of refraction is equal to 90°, the angle of incidence is called the____________________________.

Angle of incidence less than critical angle

Most light passes out
Some is internally reflected

Angle of incidence equal to critical angle

Emerging ray comes out along surface
Most internally reflected

Angle of incidence greater than critical angle

No light comes out
All internally reflected (total internal reflection)

37.04 degrees

Determine the critical angle for a ray of light traveling from flint glass to air.

33.34 degrees

Determine the critical angle for a ray of light traveling from diamond to water.

Yes

Determine if total internal reflection occurs when a ray of light passes from flint glass to lucite at an angle of 85 degrees.

No

Determine if total internal reflection occurs when a ray of light passes from diamond to air at an angle of 20 degrees.

75.26 degrees

Determine the critical angle of a ray of light passing from crown glass to corn oil.

59.73 degrees

Determine the critical angle for a ray of light that passes from sodium chloride to water.

Single-Mode

A fiber optic cable that allows for the information to pass straight down the center.

Multi-Mode

A fiber optic cable that allows for the information to pass using many different paths.