In optics, when the vibrations of light are limited to a single two dimensional plane, it is said that light has been what?

In optics, when the vibrations of light are limited to a single two dimensional plane, it is said that light has been what?
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ANSWER: POLARIZED
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Fibre optics work on the principle of - (1) scattering of light (2) total internal absorption (3) total internal reflection (4) option rotation

Description : Fibre optics work on the principle of - (1) scattering of light (2) total internal absorption (3) total internal reflection (4) option rotation

Last Answer : (3) total internal reflection Explanation: An optical fibre is a cylindrical dielectric waveguide (non-conducting waveguide) that transmits light along its axis, by the process of total internal reflection.

Fibre optics work on the principle of – (1) Scattering of light (2) Total internal absorption (3) Total internal reflection (4) Optical rotation

Description : Fibre optics work on the principle of – (1) Scattering of light (2) Total internal absorption (3) Total internal reflection (4) Optical rotation

Last Answer : (3) Total internal reflection Explanation: An optical fiber (or optical fibre) is a flexible, transparent fiber made of glass (silica) or plastic, slightly thicker than a human hair. It ... science and engineering concerned with the design and application of optical fibers is known as fiber optics.

In order for fiber optics to work, the incident light inside the fiber must hit the wall of the fiber at: w) 90 degrees x) 45 degrees y) an angle greater than the critical angle z) none of the above

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Last Answer : ANSWER: Y -- AN ANGLE GREATER THAN THE CRITICAL ANGLE 

Fiber optics cable used in communication, works on the principle of (1) regular reflection of light (2) diffuse reflection of light (3) refraction of light (4) total internal reflection of light

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Fibre optics work on the principle of (1) scattering of light (2) total internal absorption (3) total internal reflection (4) optical rotation

Description : Fibre optics work on the principle of (1) scattering of light (2) total internal absorption (3) total internal reflection (4) optical rotation

Last Answer :  total internal reflection

Holography is a technique of (1) recording a permanent, sharp two diimensional black and white or multicolour photograph (2) recording a permanent three dimensional multicolour photograph (3) recording a permanent three dimensional black and white photograph (4) recording a permanent three dimensional photograph of a given single colour or a multicolour

Description : Holography is a technique of (1) recording a permanent, sharp two diimensional black and white or multicolour photograph (2) recording a permanent three dimensional multicolour photograph (3) ... (4) recording a permanent three dimensional photograph of a given single colour or a multicolour

Last Answer : recording a permanent three dimensional photograph of a given single colour or a multicolour

What is the insertion loss of connector-type splices for a single mode fiber optics? a. 0.51dB b. 0.31dB c. 0.49dB d. 0.38dB

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Last Answer : d. 0.38dB

One of the following is among the types of fiber optics used in electronics communication. A. Step-index multimode B. Graded-index multimode C. Semi-graded multimode D. Single mode

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What is the insertion loss of connector-type splices for a single mode fiber optics? ∙ a. 0.51 dB ∙ b. 0.31 dB ∙ c. 0.49 dB ∙ d. 0.38 dB

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Last Answer : d. 0.38 dB

Ellipse of stress is used to find a. Resultant stress on any plane in a bi-axial stress system b. Resultant stress on any plane in a general two dimensional system c. Maximum shear stress d. Location of planes of maximum shear stress

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Last Answer : a. Resultant stress on any plane in a bi-axial stress system

In a general two dimensional stress system, there are a. Two principal planes b. Only one plane c. Three principal planes d. No principal plane

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Which of the following is not an application of Green’s theorem? a) Solving two dimensional flow integrals b) Area surveying c) Volume of plane figures d) Centroid of plane figures

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Last Answer : c) Volume of plane figures

Two dimensional flows occurs when (A) The direction and magnitude of the velocity at all points are identical (B) The velocity of successive fluid particles, at any point, is the same at successive periods of time (C) The magnitude and direction of the velocity do not change from point to point in the fluid (D) The fluid particles move in plane or parallel planes and the streamline patterns are identical in each plan

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Last Answer : Answer: Option D

How can 3-dimensional space be curved in a 2-dimensional plane cut through it?

Description : How can 3-dimensional space be curved in a 2-dimensional plane cut through it?

Last Answer : A doughnut, its the only shape space could take in which all physical laws still apply.

If gravity can bend 3 dimensional space into a 2D plane, could it also do it with 4 dimensional space into a 3D plane?

Description : If gravity can bend 3 dimensional space into a 2D plane, could it also do it with 4 dimensional space into a 3D plane?

Last Answer : hello!!! Space is only 3 dimensional.The 4th dimension is time which is not space.

True one-dimensional flow occurs when (A) The direction and magnitude of the velocity at all points are identical (B) The velocity of successive fluid particles, at any point, is the same at successive periods of time (C) The magnitude and direction of the velocity do not change from point to point in the fluid (D) The fluid particles move in plane or parallel planes and the streamline patterns are identical in each plane

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Who is considered the architect of optics ?

Last Answer : Ibn al-Haysam is considered to be the architect of optics.

When the body vibrates under the influence of external force, then the body is said to be under ___________ . * 1 point (A) free vibrations (B) natural vibrations (C) forced vibrations (D) damped vibrations

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Last Answer : (C) forced vibrations

Longitudinal vibrations are said to occur when the particles of a body moves A Perpendicular to its axis B Parallel to its axis C In a circle about its axis D None of the mentioned

Description : Longitudinal vibrations are said to occur when the particles of a body moves A Perpendicular to its axis B Parallel to its axis C In a circle about its axis D None of the mentioned

Last Answer : B Parallel to its axis

Longitudinal vibrations are said to occur when the particles of a body moves (A) Perpendicular to its axis B (B) Parallel to its axis (C) In a circle about its axis (D) None of the mentioned

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Last Answer : (B) Parallel to its axis

When no external force is acting on the vibrating body, the vibrations are said to be A. Free Vibrations B. Forced Vibrations C. Loaded Vibrations D. Undamped Vibrations

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When the external force is acting on the vibrating body, the vibrations are said to be A. Natural Vibrations B. Forced Vibrations C. Loaded Vibrations D. Undamped Vibrations

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Longitudinal vibrations are said to occur when the particles of a body moves a) perpendicular to its axis b) parallel to its axis c) in a circle about its axis d) none of the mentioned

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Last Answer : b) parallel to its axis

Longitudinal vibrations are said to occur when the particles of a body moves a) perpendicular to its axis b) parallel to its axis c) in a circle about its axis d) none of the mentioned

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Optics is the study of: (1) Nature and properties of light (2) Old age, its phenomenon, disease etc (3) Disease of the nervous system (4) Symbolic representations

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A dielectric waveguide for the propagation of electromagnetic energy at light frequencies a. Stripline b. Microstrip c. Laser beam d. Fiber optics

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Loss due to the diffraction of light when it strikes on the irregularities formed during the manufacturing process of the fiber optics. A. Absorption loss B. Attenuation C. Bending loss D. Rayleigh scattering loss

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A device that reduces the intensity of light in fiber optics communication systems. A. Reducer B. Quality factor C. Optical attenuator D. Compressor

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Infiber optics, thesignal is_______ waves. A) light B) radio C) infrared D) very low-frequency

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Last Answer : light

If you wanted to study the surface of a bacterial cell, you would use a. A transmission electron microscope. b. A light microscope with phase-contrast optics. c. A scanning electron microscope. d. A light microscope with dark-field optics.

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Last Answer : c. A scanning electron microscope.

If you wanted to study bacterial motility you would most likely use a. A transmission electron microscope. b. A tight microscope with dark-field optics. c. A scanning electron microscope. d. A light microscope with phase-contrast optics.

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Last Answer : a. A transmission electron microscope.

Why are visible-light LEDs not used for fiber optics? ∙ a. It has high losses ∙ b. It has short wave ∙ c. It has low attenuation ∙ d. It has weak signal

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The following are the cause of light attenuation in fiber optics except ∙ a. Backscattering ∙ b. Absorption ∙ c. Refraction ∙ d. Microbends

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A dielectric waveguide for the propagation of electromagnetic energy at light frequencies ∙ a. Stripline ∙ b. Microstrip ∙ c. Laser beam ∙ d. Fiber optics

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Last Answer : d. Fiber optics

According to D' Alembert's principle, m (d 2 x/ dt 2 ) + c (dx/dt) + Kx =0 is the differential equation for damped free vibrations having single degree of freedom. What will be the solution to this differential equation if the system is critically damped? A x = (A + Bt) e – ωt B x = X e – ξωt (sin ω d t + Φ) C x = (A – Bt) e – ωt D x = X e – ξωt (cos ω d t + Φ)

Description : According to D' Alembert's principle, m (d 2 x/ dt 2 ) + c (dx/dt) + Kx =0 is the differential equation for damped free vibrations having single degree of freedom. What will be the solution to this differential equation if the system is ... Φ) C x = (A - Bt) e - ωt D x = X e - ξωt (cos ω d t + Φ)

Last Answer : A x = (A + Bt) e – ωt

If the polar moment of inertia is increased to four times, then what will be the effect on free torsional vibrations of a single motor system? A. Increases 4 times B. Increases 2 times C. Decreases 4 times D. Decreases 2 times

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Last Answer : B. Increases 2 times

According to D' Alembert's principle, m (d 2 x/ dt 2 ) + c (dx/dt) + Kx =0 is the differential equation for damped free vibrations having single degree of freedom. What will be the solution to this differential equation if the system is critically damped? A. x = (A + Bt) e – ωt B. x = X e – ξωt (sin ω d t + Φ) C. x = (A – Bt) e – ωt D. x = X e – ξωt (cos ω d t + Φ

Description : According to D' Alembert's principle, m (d 2 x/ dt 2 ) + c (dx/dt) + Kx =0 is the differential equation for damped free vibrations having single degree of freedom. What will be the solution to this differential equation if the system is ... ) C. x = (A - Bt) e - ωt D. x = X e - ξωt (cos ω d t + Φ

Last Answer : A. x = (A + Bt) e – ωt

According to D' Alembert's principle, m (d 2 x/ dt 2 ) + c (dx/dt) + Kx =0 is the A differential equation for damped free vibrations having single degree of freedom. What will be the solution to this differential equation if the system is critically damped? ( A ) x = (A + Bt) e – ωt (B)x = X e – ξωt (sin ω d t + Φ) (C)x = (A – Bt) e – ωt ( D )x = X e – ξωt (cos ω d t + Φ

Description : According to D' Alembert's principle, m (d 2 x/ dt 2 ) + c (dx/dt) + Kx =0 is the A differential equation for damped free vibrations having single degree of freedom. What will be the solution to this differential equation if the system is ... (C)x = (A - Bt) e - ωt ( D )x = X e - ξωt (cos ω d t + Φ

Last Answer : ( A ) x = (A + Bt) e – ωt

According to D' Alembert's principle, m (d 2 x/ dt 2 ) + c (dx/dt) + Kx =0 is the differential equati damped free vibrations having single degree of freedom. What will be the solution to this differ equation if the system is critically damped? a. x = (A + Bt) e – ωt b. x = X e – ξωt (sin ω d t + Φ) c. x = (A – Bt) e – ωt d. x = X e – ξωt (cos ω d t + Φ)

Description : According to D' Alembert's principle, m (d 2 x/ dt 2 ) + c (dx/dt) + Kx =0 is the differential equati damped free vibrations having single degree of freedom. What will be the solution to this differ equation if the system is critically ... c. x = (A - Bt) e - ωt d. x = X e - ξωt (cos ω d t + Φ)

Last Answer : a. x = (A + Bt) e – ωt

f the length inertia is decreased to nine times, then what will be the effect on free torsional vibrations of a single motor system? a) Increases 3 times b) Increases 9 times c) Decreases 9 times d) Decreases 3 times

Description : f the length inertia is decreased to nine times, then what will be the effect on free torsional vibrations of a single motor system? a) Increases 3 times b) Increases 9 times c) Decreases 9 times d) Decreases 3 times

Last Answer : a) Increases 3 times

Calculate the free torsional vibrations of a single motor system from the following data: C = 8 GN/m 2 , L=9m, I = 600 Kg-m 2 , J = 8×10 4 m 4 a) 162,132 b) 172,132 c) 182,132 d) 192,132

Description : Calculate the free torsional vibrations of a single motor system from the following data: C = 8 GN/m 2 , L=9m, I = 600 Kg-m 2 , J = 8×10 4 m 4 a) 162,132 b) 172,132 c) 182,132 d) 192,132

Last Answer : b) 172,132

If the mass moment of inertia is increased to four times, then what will be the effect on free torsional vibrations of a single motor system? a) Increases 4 times b) Increases 2 times c) Decreases 4 times d) Decreases 2 times

Description : If the mass moment of inertia is increased to four times, then what will be the effect on free torsional vibrations of a single motor system? a) Increases 4 times b) Increases 2 times c) Decreases 4 times d) Decreases 2 times

Last Answer : d) Decreases 2 times

If the polar moment of inertia is increased to four times, then what will be the effect on free torsional vibrations of a single motor system? a) Increases 4 times b) Increases 2 times c) Decreases 4 times d) Decreases 2 times

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Last Answer : b) Increases 2 times

Free torsional vibrations of a single motor system increases with increase in polar moment of inertia. a) True b) False

Description : Free torsional vibrations of a single motor system increases with increase in polar moment of inertia. a) True b) False

Last Answer : b) False

Which of the following relation is correct regarding free torsional vibrations of a single motor system? a) Independent of modulus of rigidity b) Independent of polar moment of inertia c) Dependent on mass moment of inertia d) Independent of length of shaft

Description : Which of the following relation is correct regarding free torsional vibrations of a single motor system? a) Independent of modulus of rigidity b) Independent of polar moment of inertia c) Dependent on mass moment of inertia d) Independent of length of shaft

Last Answer : c) Dependent on mass moment of inertia

Which of the following pairs have different expressive power? (1) Single-tape-turing machine and multi-dimensional turing machine. (2) Multi-tape turing machine and multi-dimensional turing machine. (3) Deterministic push down automata and non-deterministic pushdown automata. (4) Deterministic finite automata and Non-deterministic finite automata.

Description : Which of the following pairs have different expressive power? (1) Single-tape-turing machine and multi-dimensional turing machine. (2) Multi-tape turing machine and multi-dimensional ... non-deterministic pushdown automata. (4) Deterministic finite automata and Non-deterministic finite automata.

Last Answer : Deterministic push down automata and non-deterministic pushdown automata.

Man perceives sound vibrations in the frequency ranges of – (1) 0 – 5 Hz (2) 6 - 10 Hz (3) 11 - 15 Hz (4) 20 - 20000 Hz

Description : Man perceives sound vibrations in the frequency ranges of – (1) 0 – 5 Hz (2) 6 - 10 Hz (3) 11 - 15 Hz (4) 20 - 20000 Hz

Last Answer : (4) 20 - 20000 Hz Explanation: The frequencies at which a human being can perceive sound vary between 20 Hertz and 20,000 Hertz. It is within these frequency ranges that people can communicate to each other and listen to music.

When a vibrating tuning fork is placed on a table, a loud sound is heard. This is due to – (1) reflection (2) refraction (3) forced vibrations (4) damped vibrations

Description : When a vibrating tuning fork is placed on a table, a loud sound is heard. This is due to – (1) reflection (2) refraction (3) forced vibrations (4) damped vibrations

Last Answer : (3) forced vibrations Explanation: The tendency of one object to force another adjoining or interconnected object into vibrational motion is referred to as a forced vibration. In the case of the ... forced into vibration. This causes an increase in the amplitude and thus loudness of the sound.

Man perceives sound vibrations in the frequency ranges of (1) 0 – 5 Hz (2) 6 – 10 Hz (3) 11 – 15 Hz (4) 20 – 20000 Hz

Description : Man perceives sound vibrations in the frequency ranges of (1) 0 – 5 Hz (2) 6 – 10 Hz (3) 11 – 15 Hz (4) 20 – 20000 Hz

Last Answer :  20 – 20000 Hz

When a vibrating tuning fork is placed on a table, a loud sound is heard. This is due to : (1) reflection (2) refraction (3) forced vibrations (4) damped vibrations

Description : When a vibrating tuning fork is placed on a table, a loud sound is heard. This is due to : (1) reflection (2) refraction (3) forced vibrations (4) damped vibrations

Last Answer : forced vibrations