Critical Angle and Total Internal Reflection Quiz

What is the condition for total internal reflection to occur?

• The angle of incidence must be less than the critical angle.

• The angle of refraction must be 45 degrees.

• Light must travel from a medium with a higher index of refraction to a lower one.

• Light must travel from a medium with a lower index of refraction to a higher one.

What is the critical angle?

• The angle of refraction that results in an angle of incidence of 45 degrees.

• The angle of refraction that results in an angle of incidence of 90 degrees.

• The angle of incidence that results in an angle of refraction of 90 degrees.

• The angle of incidence that results in an angle of refraction of 45 degrees.

Which law is used to derive the equation for the critical angle?

• Ohm's Law

• Snell's Law

• Hooke's Law

• Newton's Law

What is the critical angle for light traveling from water to air?

• 75 degrees

• 30 degrees

• 60 degrees

• 48.6 degrees

What is the significance of the critical angle in fiber optics?

• It reflects light out of the fiber.

• It determines the speed of light in the fiber.

• It allows light to be absorbed by the fiber.

• It ensures that light is transmitted without loss.

What are the two main parts of a fiber optic cable?

• Core and sheath

• Core and cladding

• Sheath and coating

• Cladding and coating

What is the index of refraction of the core in a typical fiber optic cable?

• 1.0

• 1.33

• 1.52

• 1.62

What is the critical angle for a fiber optic cable with a core index of 1.62 and cladding index of 1.52?

• 90 degrees

• 80 degrees

• 70 degrees

• 60 degrees

What is the 'cone of acceptance' in fiber optics?

• The angle range within which light is absorbed by the fiber.

• The angle range within which light is transmitted through the fiber.

• The angle range within which light is reflected within the fiber.

• The angle range within which light is refracted out of the fiber.

Why is it important for the index of refraction of the cladding to be lower than that of the core in fiber optics?

• To decrease the speed of light in the fiber.

• To increase the speed of light in the fiber.

• To ensure total internal reflection occurs.

• To allow light to escape the fiber.