The Doppler effect causes a change in what aspect of rf energy that strikes a moving object?

The Doppler effect causes a change in what aspect of rf  energy that strikes a moving object?
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1 Answer

Answer :

Frequency.
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Related questions

The term ‘Blue Shift’ is used to indicate? A. Doppler effect in which an object appears bluer when it is moving towards the observer or observer is moving towards the object? B. Turning a star from white to blue C. In future sun would become blue D. Black hole was blue at its start E. None of these

Description : The term Blue Shift' is used to indicate? A. Doppler effect in which an object appears bluer when it is moving towards the observer or observer is moving towards the object? B. Turning a star from white ... . In future sun would become blue D. Black hole was blue at its start E. None of these

Last Answer : A. Doppler effect in which an object appears bluer when it is moving towards the observer or observer is moving towards the object?

The Doppler method of object detection is best for what type objects?

Description : The Doppler method of object detection is best for what type objects?

Last Answer : Fast-moving targets.

The Doppler Effect predicts that the spectrum of light from a visible body moving AWAY from the Earth will experience a shift in frequency when viewed from Earth. This particular shift is known as the: w) Blue shift x) Neutral shift y) Red shift z) Dirac shift

Description : The Doppler Effect predicts that the spectrum of light from a visible body moving AWAY from the Earth will experience a shift in frequency when viewed from Earth. This particular shift is known as the: w) Blue shift x) Neutral shift y) Red shift z) Dirac shift

Last Answer : ANSWER: Y -- RED SHIFT

The Doppler variation is directly proportional to what radar contact characteristic?

Description : The Doppler variation is directly proportional to what radar contact characteristic?

Last Answer : Velocity.

Atmospheric interference with the travel of electromagnetic energy increases with what rf energy characteristic?

Description : Atmospheric interference with the travel of electromagnetic energy increases with what rf energy characteristic?

Last Answer : Frequency.

If a wave's electric lines of force rotate through 360 degrees with every cycle of rf energy, what is the polarization of this wave?

Description : If a wave's electric lines of force rotate through 360 degrees with every cycle of rf energy, what is the polarization of this wave?

Last Answer : Circular polarization.

In acoustics, _____ is the apparent change in frequency or pitch when a sound source moves either toward or away from a listener. A. flanking B. reverberation C. Doppler effect D. echo

Description : In acoustics, _____ is the apparent change in frequency or pitch when a sound source moves either toward or away from a listener. A. flanking B. reverberation C. Doppler effect D. echo

Last Answer : C. Doppler effect

Which of the following contributes to the broadening of laser emission bandwidth? a. Doppler shift of moving atoms and molecules b. Amplification within the laser medium c. Coherence of the laser light d. Optical pumping of the laser transition

Description : Which of the following contributes to the broadening of laser emission bandwidth? a. Doppler shift of moving atoms and molecules b. Amplification within the laser medium c. Coherence of the laser light d. Optical pumping of the laser transition

Last Answer : a. Doppler shift of moving atoms and molecules

Which of the following contributes to the broadening of laser emission bandwidth? ∙ a. Doppler shift of moving atoms and molecules ∙ b. Amplification within the laser medium ∙ c. Coherence of the laser light ∙ d. Optical pumping of the laser transition

Description : Which of the following contributes to the broadening of laser emission bandwidth? ∙ a. Doppler shift of moving atoms and molecules ∙ b. Amplification within the laser medium ∙ c. Coherence of the laser light ∙ d. Optical pumping of the laser transition

Last Answer : Doppler shift of moving atoms and molecules

A Doppler Radar operating at 15 GHz is viewing a target moving directly towards it at the speed of 25 m/s.

Description : A Doppler Radar operating at 15 GHz is viewing a target moving directly towards it at the speed of 25 m/s. The Doppler frequency shift

Last Answer : A Doppler Radar operating at 15 GHz is viewing a target moving directly towards it at the speed of 25 m/s. The Doppler frequency shift 2.5 KHz

Moving tube electrodes apart to decrease interelectrode capacitance causes an increase in the effect of what property?

Description : Moving tube electrodes apart to decrease interelectrode capacitance causes an increase in the effect of what property?

Last Answer : Transit time

What two methods are used to compensate for the problems that cause low gain in an rf amplifier?

Description : What two methods are used to compensate for the problems that cause low gain in an rf amplifier?

Last Answer : . RF transformers are used and the transistor is neutralized.

What problem is caused in an rf amplifier by a loosely coupled transformer?

Description : What problem is caused in an rf amplifier by a loosely coupled transformer?

Last Answer : A too-narrow bandpass.

What is the most common form of coupling for an rf amplifier?

Description : What is the most common form of coupling for an rf amplifier?

Last Answer : Transformer coupling.

Can a parallel LC circuit be used as the frequency determining network for an rf amplifier?

Description : Can a parallel LC circuit be used as the frequency determining network for an rf amplifier?

Last Answer : Yes.

What is the purpose of a frequency-determining network in an rf amplifier?

Description : What is the purpose of a frequency-determining network in an rf amplifier?

Last Answer : To provide maximum impedance at the desired frequency.

If current gain is required from an rf amplifier, what type of component should be used as an output coupling element?

Description : If current gain is required from an rf amplifier, what type of component should be used as an output coupling element?

Last Answer : A step-down transformer.

What is the result of pulsing a pulsed rf amplifier when no rf is present?

Description : What is the result of pulsing a pulsed rf amplifier when no rf is present?

Last Answer : Oscillations at an undesired frequency.

Rotation of an rf-feed source to produce a conical scan pattern is identified by what term?

Description : Rotation of an rf-feed source to produce a conical scan pattern is identified by what term?

Last Answer : Nutation.

At what point on an open-circuited rf line do voltage peaks occur?

Description : At what point on an open-circuited rf line do voltage peaks occur?

Last Answer : At 1/2 wavelength from the end and at every 1/2 wavelength along the line

If the rf amplifier discussed has an 80 milliwatt input, what would be the maximum output?

Description : If the rf amplifier discussed has an 80 milliwatt input, what would be the maximum output?

Last Answer : 800 watts.

What is the most common method of testing a fixed rf attenuator?

Description : What is the most common method of testing a fixed rf attenuator?

Last Answer : Rf substitution method.

Normally, how are high-power rf tubes tested?

Description : Normally, how are high-power rf tubes tested?

Last Answer : In their circuit.

Name the three main sections of a typical rf signal generator.

Description : Name the three main sections of a typical rf signal generator.

Last Answer : Oscillator circuit, modulator, and output control circuit.

How does the reactance-tube modulator impress intelligence onto an rf carrier?

Description : How does the reactance-tube modulator impress intelligence onto an rf carrier?

Last Answer : By changing the reactance of an oscillator circuit in consonance with the modulating voltage.

For what class of operation is the final rf power amplifier of a plate-modulator circuit biased?

Description : For what class of operation is the final rf power amplifier of a plate-modulator circuit biased?

Last Answer : Class C

What is the Doppler effect?

Description : What is the Doppler effect?

Last Answer : The Doppler effect is the change in frequency or wavelength of a wave in relation to an observer who is moving relative to the wave source, and is an important concept in physics and astronomy.

What is the Doppler effect?

Description : What is the Doppler effect?

Last Answer : The Doppler effect is the change in frequency or wavelength of a wave in relation to an observer who is moving relative to the source of the wave, resulting in a perceived change in pitch or color.

What is the Doppler effect?

Description : What is the Doppler effect?

Last Answer : The Doppler effect is the change in frequency or wavelength of a wave (such as light or sound) as its source or observer moves relative to an observer or receiver.

How does the Doppler effect shift light's wavelength?

Description : How does the Doppler effect shift light's wavelength?

Last Answer : ””

Why does the Doppler effect explain why a siren's pitch decreases as it moves away from you?

Description : Why does the Doppler effect explain why a siren's pitch decreases as it moves away from you?

Last Answer : The siren moves away from the sound waves it has already produced, increasing their wavelength. Make sure it says INCREASING and not DECREASING -Apex :)

Which of the following is one of the possible causes for a slow drift of frequency in a self exited transmitter oscillator circuits resulting to a poor frequency stability? A. Poor soldered connections B. Power supply voltage changes C. Loose connections in the oscillator, amplifier, or antenna circuits D. DC and RF heating of resistors, causing then to change values.

Description : Which of the following is one of the possible causes for a slow drift of frequency in a self exited transmitter oscillator circuits resulting to a poor frequency stability? A. Poor soldered connections ... , or antenna circuits D. DC and RF heating of resistors, causing then to change values.

Last Answer : D. DC and RF heating of resistors, causing then to change values.

Assume light is traveling through glass, what happens when this light strikes the glass-air boundary?

Description : Assume light is traveling through glass, what happens when this light strikes the glass-air boundary?

Last Answer : Part of the light ray is reflected back into the glass and part of the light ray is refracted (bent) as it enters the air.

When light strikes a piece of white paper, the light is reflected in all directions. What do we call this scattering of light?

Description : When light strikes a piece of white paper, the light is reflected in all directions. What do we call this scattering of light?

Last Answer : Diffusion.

Why is the physical length of a coaxial cable transmission line shorter than its electrical length?A. Skin effect is less pronounced in the coaxial cable B. RF energy moves slower along the coaxial cable C. The surge impedance is higher in the parallel feed line D. The characteristic impedance is higher in the parallel feed line

Description : Why is the physical length of a coaxial cable transmission line shorter than its electrical length? A. Skin effect is less pronounced in the coaxial cable B. RF energy moves slower along the ... higher in the parallel feed line D. The characteristic impedance is higher in the parallel feed line

Last Answer : B. RF energy moves slower along the coaxial cable

A ball A of mass 0.25 kg moving on a smooth horizontal table with a velocity of 10 m/s strikes an identical stationary ball B on the table. If the impact is perfectly elastic, the velocity of the ball B just after the impact will be a.2.5 m/s b.zero c.5 m/s d.10 m/s e.107 dynes

Description : A ball A of mass 0.25 kg moving on a smooth horizontal table with a velocity of 10 m/s strikes an identical stationary ball B on the table. If the impact is perfectly elastic, the velocity of the ball B just after the impact will be a.2.5 m/s b.zero c.5 m/s d.10 m/s e.107 dynes

Last Answer : c. 5 m/s

Water jet coming out of a stationary horizontal tube at speed v strikes horizontally a massive wall moving in opposite with same speed. Water come to

Description : Water jet coming out of a stationary horizontal tube at speed v strikes horizontally a massive wall moving in opposite with same speed. Water come to

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If A rock is dropped from the top of a 15m tall building. How fast is it moving just before it strikes the ground?

Description : If A rock is dropped from the top of a 15m tall building. How fast is it moving just before it strikes the ground?

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A 500 kilogram car moving at 20 meters per second strikes a stone wall and is brought to a halt in 0.1 second. The average force of the car on the wall during impact is: w) 10 Newtons x) 1000 Newtons y) 10,000 Newtons z) 100,000 Newtons

Description : A 500 kilogram car moving at 20 meters per second strikes a stone wall and is brought to a halt in 0.1 second. The average force of the car on the wall during impact is: w) 10 Newtons x) 1000 Newtons y) 10,000 Newtons z) 100,000 Newtons

Last Answer : ANSWER: Z -- 100,000 NEWTONS

A ray of white light strikes the surface of an object. If all the colours are reflected, the surface would appear (1) Black (2) White (3) Grey (4) Opaque

Description : A ray of white light strikes the surface of an object. If all the colours are reflected, the surface would appear (1) Black (2) White (3) Grey (4) Opaque

Last Answer : (2) White Explanation: Objects do not have any colour of their own. When light hits a surface, some of it is absorbed and some of it is reflected. The light that is reflected is ... appear white when they reflect all the wavelengths; they appear black when they absorb all visible wavelengths.

The frequency response of test equipment refers to what aspect of ac voltage measurements?

Description : The frequency response of test equipment refers to what aspect of ac voltage measurements?

Last Answer : the range of frequencies that can accurately be measured.

What do you think is the worst aspect of moving?

Description : What do you think is the worst aspect of moving?

Last Answer : I hate packing. I get depressed every time we move. I feel like I’m being pulled up by my roots. I love decorating and renovating the new place but I always feel so displaced.

Which of the following are not programming paradigms types:a) Object Oriented Programmingb) Aspect Oriented Programmingc) Session Oriented Programmingd) Structured Programminge) None of These

Description : Which of the following are not programming paradigms types: a) Object Oriented Programming b) Aspect Oriented Programming c) Session Oriented Programming d) Structured Programming e) None of These

Last Answer : c) Session Oriented Programming

Can over use of the wifes fetal doppler radar harm the baby in any way?

Description : Can over use of the wifes fetal doppler radar harm the baby in any way?

Last Answer : answer:What is a fetal doppler radar? I have heard them in conjunction with tracking the weather, but not fetuses. Not an answer, sorry, but I am curious. and too lazy to google it

What is Doppler ?

Description : What is Doppler ?

Last Answer : The apparent change in the frequency of the audible sound as a result of the relative motion between the sound source and the listener is called Doppler action . Doppler verbs are one of the topics in word science. In 1842, the Austrian physicist Doppler provided this formula.

Which instrument are used for recording the occurrence of the earthquakea) Richter scale b) Seismograph c) Seismometer d) Doppler rader

Description : Which instrument are used for recording the occurrence of the earthquake a) Richter scale b) Seismograph c) Seismometer d) Doppler rader

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For C band Synthetic Aperture Radar (SAR) with Doppler band width of 1300 Hz, the coherence length loch is: (A) 130 km (B) 230 km (C) 250 km (D) 500 km

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Last Answer : Answer: Option B

67. The physician ordered bilateral lower extremities Doppler ultrasound. Which of the following is the physician interested to find out through this diagnostic test?

Description : 67. The physician ordered bilateral lower extremities Doppler ultrasound. Which of the following is the physician interested to find out through this diagnostic test?

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In a Doppler VOR (DVOR) the reference signal is _____, the bearing signal is ______ and the direction of rotation of the bearing signal is ______. a. AM, FM, anti-clockwise b. AM, FM, clockwise c. FM, AM, anti-clockwise d. FM, AM, clockwise

Description : In a Doppler VOR (DVOR) the reference signal is _____, the bearing signal is ______ and the direction of rotation of the bearing signal is ______. a. AM, FM, anti-clockwise b. AM, FM, clockwise c. FM, AM, anti-clockwise d. FM, AM, clockwise

Last Answer : a. AM, FM, anti-clockwise

A small cluster of stars appear, after many decades of observation, to be converging toward a common point in the sky. Does the light from these stars show a: w) red Doppler shift x) blue Doppler shift y) no Doppler shift

Description : A small cluster of stars appear, after many decades of observation, to be converging toward a common point in the sky. Does the light from these stars show a: w) red Doppler shift x) blue Doppler shift y) no Doppler shift

Last Answer : ANSWER: W -- RED DOPPLER SHIFT