A radio wave of 0.6 m is detected from a galaxy that is moving away at a rate of 0.87c. Estimate the wavelength of the signal when it was emitted.
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A: We will answer the question using the relativistic velocity addition formula. The detailed steps are…
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A: About speed of light .
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A: Given Spaceship speed = 0.209 times the speed of light The wave length of the laser light = 687 nm…
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A: Given data, Speed = V The wavelength emitted by the source= λs=λ0 The wavelength received by the…
Q: A speeder tries to explain to the police that the yellow warning lights she was approaching on the…
A: The yellow light has wavelength = 576.6 nmThe frequency of the yellow light HzThe green light has…
Q: A spaceship moving toward Earth at 0.70c transmits radio signals at 95.0 MHz. At what frequency…
A: We have Transmission frequency ft = 95 MHz ft = 95 × 106 Hz Speed of spaceship v = 0.70c…
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Q: a.) Galaxy B moves away from galaxy A at 0.521 times the speed of light. Galaxy C moves away from…
A: Given ( a )Galaxy B moves away from galaxy A at 0.521 times the speed of light Galaxy C moves away…
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A: V=0.201c λe=681 nm
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Q: A spaceship moving away from the earth at 0.900c fires a robots pace probe in the same direction as…
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Q: A star’s spectrum emits more radiation with a wavelength of 690.0 nm than with any other wavelength.…
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- Light also shows wavelike properties and exhibits Doppler shift. Since light does not require any medium to travel the Doppler shift in light only depends on the relative velocity of the observer and source.
- When the source is moving away from the observer the wavelength will be longer and is called redshift. When the source is moving toward the observer the wavelength will be shorter and is called blueshift.
- The observed wavelength is given by,
Here λ is the observed wavelength, λ0 is the emitted wavelength, v is the relative velocity, and c is the speed of light.
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- The light from a supernova explosion is measured on a spacecraft moving towards the exploding star. Which of the following would be observed? The apparent frequency would appear to be higher than for a stationary observer. The apparent wavelength would appear to be shorter than for a stationary observer. The apparent speed of the light would be higher than for a stationary observer. a I only b II only c I and II only d I and III onlyChapter 37, Problem 039 A spaceship is moving away from Earth at a speed of 0.21c. A light source on the rear of the ship emits a light with wavelength 515 nm according to passengers on the ship. What wavelength is detected by someone on Earth watching the ship? Number UnitsThe distance from Earth to a spaceship is 7.69 x 109 m. Calculate the time for a radar signal to travel from Earth to the spaceship in units of seconds.
- A duck, standing by the side of the road at night, sees a car approaching at a speed of 0.2c. If the driver is shining a flashlight forward as the car advances, find the speed of the light from the flashlight relative to the duck.9) A rocket with a speed of 0.5 c is moving toward a stationary observer. It is putting out a light ray with a wavelength of 500 nm. What is the speed of that light ray as seen by the stationary observer? 10) In (9) what is the wavelength of the light as seen by the stationary observer? 11) If the light ray in (9) is pulsed so that to an observer on the rocket there are 100 pulses every second, what is the number of pulses per second as seen by the stationary observer? (Note that this, in essence creates a clock on the rocket).Astronomers determine that a particular star in our galaxy is moving toward Earth at a speed of 716.0 km/s with respect to the Earth. If Earth receives a wavelength ? = 689.6 nm from this star, what was the wavelength emitted by the star?
- (a) In communicating with an astronaut on the moon, 3.8E8 m from earth, what is the minimum time delay in getting a response to a question? (b) What would the minimum time delay be for communication with an astronaut at a distance of 4 light-years from earth?You are in the Enterprise traveling at half the speed of light (v = 0.5c), heading toward a Borg spaceship. You fire your phasers and you see the light waves leaving your ship at the speed of light c = 3x108 m/s toward the Borg. With what speed do the Borg see the phaser blasts approaching their ship? a) less than .5c b) 0.5c c) c d) 1.5c e) more than 2c3. Alice is moving with 0.8c towards a mirror. She sends a light pulse towards the mirror when she is at a distance L from the mirror. Bob is at rest with respect to the mirror and is observing this experiment. After how long will Alice receive the reflected pulse, as measured by Alice and Bob?
- A certain X-ray machine generates X-rays from a beam of electrons accelerated from zero to 99.9999999 per cent the speed of light in a long linear accelerator of length 3.2 km. The electrons are generated in pulses of duration ∆t = 100 fs. The generated x-rays from the target are also short pulses (λ = 0.15 nm). What is the average power of the x-ray beam if it pulses 120 times per second and one x-ray pulse contains about a trillion photons (n = 1012). a) 16.0 W b) 1.6 W c) 0.16 W d) none of these.Spacecraft Alpha moving at 0.60c with respect to the earth. If spacecraft Beta has a speed of 0.20c with respect to the earth in the same direction as Alpha. Calculate the speed of Alpha as measured from spacecraft BetaA UFO travels at such a speed as to remain above one point on the earth ata height of 200 km above the earth's surface. A radio signal of frequency 110:0 MHz is sent to the UFO. i.What is the shift in the frequency received by the UFO? ii. If the signal was reflected back to earth, what would be the observed frequency of the return signal?