Q. The light sources used in fibre optics communication are ____________

View solution

Q. The ________ ray passes through the axis of the fiber core.

View solution

Q. Light incident on fibers of angles________the acceptance angle do not propagate into the fiber.

View solution

Q. What is the numerical aperture of the fiber if the angle of acceptance is 16 degree?

View solution

Q. The ratio of speed of light in air to the speed of light in another medium is called as _________

View solution

Q. When a ray of light enters one medium from another medium, which quality will not change?

View solution

Q. Which equations are best suited for the study of electromagnetic wave propagation?

View solution

Q. When λ is the optical wavelength in vacuum, k is given by k=2Π/λ. What does k stand for in the above equation?

View solution

Q. Constructive interference occur when total phase change after two successive reflections at upper and lower interfaces is equal to? (Where m is integer)

View solution

Q. When light is described as an electromagnetic wave, it consists of a periodically varying electric E and magnetic field H which are oriented at an angle?

View solution

Q. A monochromatic wave propagates along a waveguide in z direction. These points of constant phase travel in constant phase travel at a phase velocity Vₚ is given by?

View solution

Q. Which is the most important velocity in the study of transmission characteristics of optical fiber?

View solution

Q. What is refraction?

View solution

Q. The phenomenon which occurs when an incident wave strikes an interface at an angle greater than the critical angle with respect to the normal to the surface is called as ____________

View solution

Q. A multimode step index fiber has a normalized frequency of 72. Estimate the number of guided modes.

View solution

Q. A graded-index fiber has a core with parabolic refractive index profile of diameter of 30 μm, NA=0.2, λ=1 μm. Estimate the normalised frequency.

View solution

Q. A step-index fiber has core refractive index 1.46 and radius 4.5 μm. Find the cutoff wavelength to exhibit single mode operation. Use relative index difference as 0.25%.

View solution

Q. A single-mode step-index fiber or multimode step-index fiber allows propagation of only one transverse electromagnetic wave.

View solution

Q. One of the given statements is true for intermodal dispersion. Choose the right one.

View solution

Q. For lower bandwidth applications ______________

View solution