Description : What is the law of reflection?
Last Answer : The law of reflection states that the angle of incidence is equal to the angle of reflection.
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 : 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.
Description : . When is the reflection energy the least?
Last Answer : When the wave is perpendicular to the reflecting surface.
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 : What is the 1st law of reflection ?
Last Answer : The first law of reflection: the incident ray , the reflected ray and the perpendicular drawn on the reflector at the point of incidence are in the same plane.
Description : What does the law of reflection tell us about the angle of a reflected ray of light?
Last Answer : The law of reflection states that a light ray will reflect at the same angle that it hits a surface. We can use this law to guide light to different targets!
Description : Lambert's law is related to – (1) Reflection (2) Refraction (3) Interference (4) Illumination
Last Answer : (4) Illumination Explanation: In optics, Lambert's cosine law says that the radiant intensity or luminous intensity observed from an ideal diffusely reflecting surface or ideal diffuse radiator is directly proportional ... . The law is also known as the cosine emission law or Lambert's emission law.
Description : Lamberts law is related to – (1) Reflection (2) Refraction (3) Interference (4) Illumination
Last Answer : (4) Illumination Explanation: Lambert's Law says that the intensity of emitted light from a surface is directly proportional to the cosine of the angle between the line of view and the normal ... , and exhibits Lambertian reflectance. Such a surface has the same radiance when viewed from any angle.
Description : An Electromagnetic wave falls on to a boundary between two losses less homogeneous media with different refractive indices, a part of the wave is reflected back to the incident medium and the rest is transmitted ... A) Fresnel reflection (B) Fresnel refraction (C) Snell's law (D) None of these
Last Answer : Answer: Option A
Description : The reflectance from a surface is called specular reflection if it follows: (A)snell's law (B) Lambert's cosine law (C) Planktan's law (D) All of thes
Description : Light traveling in optical fiber follows which of the following principles. ∙ a. Huygen’s principle ∙ b. Reflection theory ∙ c. Light theory ∙ d. Snell’s law
Last Answer : d. Snell’s law
Description : Lamberts law is related to (1) Reflection (2) Refraction (3) Interference (4) Illumination
Last Answer : Illumination
Description : How does the law of magnetic poles relate to the law of electric charges?
Last Answer : They are very similar; like charges repel, unlike charges attract, like poles repel —unlike poles attract.
Description : State Lenz's law.
Last Answer : The induced emf in any circuit is in a direction to oppose the effect that produced it.
Description : Light waves obey what law?
Last Answer : The law of reflection.
Description : In applying Kirchhoff’s current law, what does the polarity of the current indicate?
Last Answer : Whether the current is entering the junction (+) or leaving the junction (-).
Description : According to Ohm’s law, what happens to circuit current if circuit resistance (a) increases, (b) decreases?
Last Answer : (a) Current decreases (b) Current increases
Description : According to Ohm’s law, what happens to circuit current if the applied voltage (a) increases, (b) decreases?
Last Answer : (a) Current increases (b) Current decreases
Description : When using Kirchhoff’s voltage law, how are voltage polarities assigned to the voltage drops across resistors?
Last Answer : The point at which current enters the resistor is assigned a negative polarity and the point at which current leaves the resistor is