OCN-Q5

What is Numerical Aperture (NA) in optical fibers?

• A) The ratio of the speed of light in the core to that in the cladding

• B) The measure of the light-gathering ability of an optical fiber

• C) The angle at which light is refracted inside the fiber

• D) The difference between the core and cladding refractive indices

Which of the following equations correctly defines the Numerical Aperture (NA)?

• A) NA = √(n1² - n2²)

• B) NA = (n1 - n2) / (n1 + n2)

• C) NA = 2(n1 - n2)

• D) NA = (n1 + n2) / 2

If the core refractive index (n1) is 1.48 and the cladding refractive index (n2) is 1.46, what is the Numerical Aperture (NA) of the fiber?

• A) 0.196

• B) 0.242

• C) 0.346

• D) 0.490

What does a higher Numerical Aperture (NA) indicate in an optical fiber?

• A) Lower light-gathering ability

• B) Greater light-gathering ability and acceptance angle

• C) Smaller acceptance angle

• D) Higher attenuation in the fiber

Which parameter is directly affected by the Numerical Aperture (NA) of an optical fiber?

• A) Fiber core diameter

• B) Fiber bandwidth

• C) Fiber attenuation

• D) Fiber acceptance angle