Description : When a wave is reflected from a surface, energy is reflected. When is the reflection of energy the greatest?
Last Answer : When the wave is nearly parallel to the reflecting surface.
Description : incidence and reflection that are perpendicular to the waveguide walls?
Last Answer : Cutoff frequency.
Description : Assuming the wall of a waveguide is perfectly flat, what is the angular relationship between the angle of incidence and the angle of reflection
Last Answer : The angles are equal.
Description : What is the law of reflection?
Last Answer : The law of reflection states: The angle of incidence is equal to the angle of reflection.
Description : Reduction of Fresnel reflection is possible by reducing the step change in the refractive index at the fiber interface. What material reduces the step change in refractive index at a fiber interface?
Last Answer : Index matching gel.
Description : In fiber-to-fiber connections, Fresnel reflection is one source of coupling losses. Light is reflected back into the source fiber and is lost. What causes Fresnel reflection?
Last Answer : A step change in refractive index that occurs at fiber joints, caused by fiber separation.
Description : Light propagates in multimode graded-index fibers according to refraction and total internal reflection. When does total internal reflection occur?
Last Answer : When the angle of incidence becomes larger than the critical angle of incidence.
Description : What name is given to the angle where total internal reflection occurs?
Last Answer : Critical angle of incidence.
Last Answer : The law of reflection states that the angle of incidence is equal to the angle of reflection.
Description : What amplifier class of operation is the most inefficient but has the least distortion?
Last Answer : Class A.
Description : Which wire has the least resistance? Wire A-copper, 1000 circular mils, 6 inches long. Wire B-copper, 2000 circular mils, 11 inches long.
Last Answer : Wire B.
Description : The tendency of the sound energy to spread. A. Rarefaction B. Reflection C. Refraction D. Diffraction
Last Answer : D. Diffraction
Description : Tendency of sound energy to spread. A. Reflection B. Diffraction C. Rarefaction D. Refraction
Last Answer : B. Diffraction
Description : Pick out the wrong statement: (A) With change in temperature, the radiant energy emitted by a black body remains unchanged (B) Absorptivity of a body approaches unity in case of diffuse reflection (C) Absorptivity of ... unity (D) Value of Stefan-Boltzmann constant is 4.876 10 -8 KCal/m2 .hr.°K4
Last Answer : (A) With change in temperature, the radiant energy emitted by a black body remains unchanged
Description : A back-and-forth pattern of motion that transfers energy A. Wave B. Pulse C. Reflection D. Frequency
Last Answer : D. Frequency