A fiber optic cable uses total internal reflection. What is the minimum refractive index required for the core if the cladding has a refractive index of 1.45?
Practice Questions
1 question
Q1
A fiber optic cable uses total internal reflection. What is the minimum refractive index required for the core if the cladding has a refractive index of 1.45?
1.50
1.45
1.60
1.75
For total internal reflection, the core must have a higher refractive index than the cladding, so it must be greater than 1.45.
Questions & Step-by-step Solutions
1 item
Q
Q: A fiber optic cable uses total internal reflection. What is the minimum refractive index required for the core if the cladding has a refractive index of 1.45?
Solution: For total internal reflection, the core must have a higher refractive index than the cladding, so it must be greater than 1.45.
Steps: 5
Step 1: Understand that a fiber optic cable has two parts: the core and the cladding.
Step 2: Know that the core is the part that carries the light, and the cladding surrounds it.
Step 3: Remember that for total internal reflection to happen, the core must have a higher refractive index than the cladding.
Step 4: Identify the refractive index of the cladding, which is given as 1.45.
Step 5: Conclude that the refractive index of the core must be greater than 1.45 for total internal reflection to occur.
