The frequency of light emitted from hydrogen present in the Andromeda galaxy has been found to be 0.10% higher than that from hydrogen measured on Earth. (a) Is this galaxy approaching or receding from the Earth, and (b) at what speed?

Q: The proper length of one spaceship is three times that of another. The two spaceships are traveling…

A: The proper length of the faster ship is three times that of the slower ship

Q: Spatial separation between two events. For the passing reference frames of the figure, events A and…

A: Given Time period,  ∆t=tB-tA=2μs unprimed frame, ∆x=xB-xA=497M  d∆x'dβ=β∆x-c∆t1-β232=0 Where c is…

Q: An airplane is moving with respect to the earth at a speed of 600 m/s. Its proper length is 50 m. By…

A: Proper length of airplane Lo=50 m and velocity of plane 600 m/s.  We need to find the length of the…

Q: A spacecraft receding from the earth emits radio waves at a constant frequency of 10^9 Hz. If the…

A: Let the difference between the classical and relativistic frequency of the radio wave be 1 Hz. For…

Q: Suppose a galaxy is moving away from the Earth at a speed 0.825c . It emits radio waves with a…

A:

Q: The crew of an enemy spacecraft attempts to escape from your spacecraft by moving away from you at…

A:

Q: Two spaceships approach the Earth from opposite directions. According to a stationary observer on…

A: The answer is below

Q: What two main obstacles prevent us from traveling today throughout the galaxy at relativistic…

A: The first obstacle that prevents us from traveling throughout the galaxy is that it is the…

Q: One cosmic-ray particle approaches Earth along Earth’s north–south axis with a speed of 0.80c toward…

A: The velocity addition rule is given by,

Q: A star is 15.0 light - years (ly) from Earth. (a) At what constant speed must a spacecraft travel on…

A: a)The gamma factor is given by

Q: An alarm clock is set to sound in 10 h. At t = 0, the clock is placed in a spaceship moving with a…

A:

Q: The frequency of light emitted from hydrogen present in the Andromeda galaxy has been found to be…

A:

Q: In an Earth reference frame, a star is 44 light-years away. At what per cent of the speed of light…

A:

Q: Suppose that a father is 23.00 y older than

A:

Q: n enemy spacecraft attempts to escape from your spacecraft by moving away from you at 0.273 of the…

A: Given data:-  The crew of an enemy spacecraft attempts to escape from your spacecraft by moving away…

Q: Suppose that a person is 15.00 y older than their sibling. The person wants to travel outward from…

A: Let the age of sibling be = x Age of person = x + 15 Age of person when return = x+ 15 +4 = x + 19…

Q: A spacecraft receding from the earth emits radio waves at a constant frequency of 109 Hz. If the…

A: Given data: Frequency f = 109 Hz

Q: If you were on Earth monitoring a person in a rocket ship traveling away from Earth at a speed close…

A: Given: If you were on Earth monitoring a person in a rocket ship traveling away from Earth at a…

Q: The crew of an enemy spacecraft attempts to escape from your spacecraft by moving away from you at…

A:

Q: Suppose that a person is 20.00 y older than their sibling. The person wants to travel outward from…

A: We have to use concept of time dilation here.

Q: A light source and an observer approach each other with relative speed v 0.9c, and the frequency…

A:

Q: In 1985 the space shuttle Challenger flew a cesium clock and compared its time with a fixed clock…

A: v = 7712 m/sc = 3×108 m/sβ = 77123×108β = 2.57×10-5

Q: A spacecraft with a proper length of Lp passes by an observer on the Earth. According to this…

A: It is known that when an object moves in high speed with respect to an observer then its length…

Q: Space cruisers A and B are moving parallel to the positive direction of an x axis. Cruiser A is…

A:

Q: A spaceship, moving away from Earth at a speed of 0.900c, reports back by transmitting at a…

A:

Q: At what speed is an electron’s total energy 50% more than its rest energy?

A: GIVEN :-            Total energy is 50% more than its rest energy.            i.e  Total energy =…

Q: A spaceship measures bright flashes of light from a distant star. The spacecraft now heads toward…

A:

Q: Suppose a celestial body is moving away from the Earth at a speed of 0.325c. It emits radio waves…

A:

Q: A space shuttle passes over the Earth at v = 0.90c speed. If the length of space shuttle observed by…

A: Speed of the shuttle is v = 0.90c Length of the shuttle is lo = 100 m

Q: Many galaxies have supermassive black holes at their centers. As material swirls around such a black…

A:

Q: You have been posted to a remote region of space to monitor traffic. Near the end of a quiet shift,…

A:

Q: A star is 5.00 ly from the Earth. At what speed must a spacecraft travel on its journey to the star…

A: Given Data:   The actual distance between the earth and the star is, L0=5.00 ly The largest distance…

Q: The length of a spacecraft at rest is 150.0 m. At what speed would the spacecraft have to be…

A: Length of the spacecraft (Lo)= 150 m Length observed by other observer is L And L= Lo/2 Let its…

Q: An out-of-control alien spacecraft is diving into a star at a speed of 1.0 x 108 m/s. At what speed,…

A: According to the Einstein principle of relativity the speed of the light will be always same in all…

Q: To whom does an object seem greater in length, an observer moving with the object or an observer…

A: In case 1 - Observer moving with the object. As, in this observer is moving with an object his and…

Q: A nuclear process, producing two elcctrons moving in the opposite direction each with a velocity…

A: A nuclear process, producing two elcctrons moving in the opposite direction each with a velocity…

Speed of light

The speed at which the light travels in a vacuum is unbiased for both the source and inertial frame of reference of the observer. This was postulated by the physicist, Albert Einstein, by observing the theory of electromagnetism of Maxwell. Also, there was no evidence for the luminiferous aether, that is, the medium for the propagation of light where the electromagnetic field exists.