Distances in space are often quoted in units of lightyears, the distance light travels in 1 year. (a) How many meters is a light-year? (b) How many meters is it to Andromeda, the nearest large galaxy, given that it is 2.54 × 106 ly away? (c) The most distant galaxy yet discovered is 13.4 × 109 ly away. How far is this in meters?

Q: Lunar astronauts placed a reflector on the Moon’s surface, from which a laser beam is periodically…

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Q: In the “red shift” of radiation from a distant galaxy, the light Hy, known to have a wavelength of…

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Q: Lunar astronauts placed a reflector on the Moon’s surface, off which a laser beam is periodically…

A: c=Speed of light=3×108 m/st=Round trip time=0.1 ns=0.1×10−9 st0.5=One way=t2=0.1×10−92=0.05×10−9 s

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A: The speed of light is constant in vacuum , (c= 3x108 m/s) and it is related wavelength λ (in m) and…

Q: A space probe emits a radio signal toward Earth at regular time intervals. One such pulse arrives on…

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Q: How far does a beam of light travel in 1.30 ns?

A: Given: time t = 1.3 ns = 1.3*10-9 s to find: distance travelled d = ??

Q: Two astronauts are 1.10 m apart in their spaceship. One speaks to the other. The conversation is…

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Q: Alpha Centauri, the closest star to the Sun, is 4.3 ly away. Howfar is this in meters?

A: Given data The distance between alpha Centuri and the Sun in light-year is dly=4.3 ly As the 1 ly is…

Q: The rainbow of visible colors in the electromagnetic spectrum varies continuously from the longest…

A: The frequency of light is calculated by using the formula f=cλ , where c=3×108 m/s is the speed of…

Q: Which of the following will emit an EM WAVE? Choose all that apply. O A neutrino that is stationary.…

A: Given Different options are given We have to choose the correct option

Q: EM signal was reflected off a moving object. What would be the frequency of the reflected EM signal?…

A: When the EM signals reflected off a moving object, the frequency of the reflected EM signal would…

Q: : If the Sun suddenly went dark, we would not know it until its light stopped arriving on Earth.…

A: Given data The distance between the sun and the earth is given as d = 1.5 x 1011 m.

Q: All electromagnetic radiation moves at the same speed, which is the speed. In a vacuum, the speed of…

A: Given value--- speed of radiation = 3 × 108 m/s. distance = 149.6 million km. We have to find---…

Q: If the Sun suddenly turned off, we would not know it until its light stopped coming. How long would…

A: Distance between sun and earth (d)=1.5×1011 m Speed of light (c)=3×108 m/s

Q: A-97 units @ 196.5 degrees B-311 units @ 217.4 degrees C-374 units @ 228.1 degrees HĎ - Ä+B+Ö Find D…

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

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Q: Volume (ml) Pression (kPa) 1/Pression (kPa") 20 96.6826 18 105.9603 16 115.7262 14 127.4453 12…

A: V(ml) Pression(kPa) 1/Pression(kPa-1) Constant k PV (l.Pa) 20 96.6826 0.010343…

Q: Assume (unrealistically) that a TV station acts as a point source broadcasting isotropically at 1.0…

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Q: A planet is about 2.3x1011 m away from the Earth. The time for a radio signal to travel from the…

A: Given data:  Distance of planet from earth (d) = 2.3×1011 m Speed of radio signal is equal to the…

Q: In 1957, the U.S. Naval Research Laboratory conducted the first ever radar measurements of the…

A: Since light travelled back and forth, the total distance of travel is (2×3.84×108m). We know, the…

Q: Which of the following is not a physical implication of Maxwell’s Equations? a. A point charge at…

A: a) option is correct.

Q: When light propagates in vacuum there is an electric field and a magnetic field. These fields: O a.…

A: Magnetic field and electric field are perpendicular to the direction of propagation of light…

Q: - Calculate the expected fringe shift in the Michelson- Morley experiment, if the distance of each…

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Q: EMW (Electromagnetic waves) are produced by   A. A proton speeds up from 50m/s to 75m/s   B. An…

A: Introduction: Electromagnetic waves are transverse waves. When electromagnetic waves propagate with…

Q: If the Sun suddenly turned off, we would not knowit until its light stopped coming. How long would…

A: GIven: The distance of the sun = 1.496 x 1011 m Time =?

Q: The Juno spacecraft arrived at Jupiter on July 4, 2016. Assuming the distance between the Earth and…

A: Given data: Distance d = 6.30×1011 m Speed v = 3×108 m/s

Q: Lunar astronauts placed a reflector on the Moon’s surface, off which a laser beam is periodically…

A: We know, distance and time are related as The accuracy in the distance can be obtained as

Q: A spacecraft antenna is at an angle of 10° relative to the axis of the spacecraft. If the spacecraft…

A:

Q: Two astronauts are 2.50 m apart in their spaceship. One speaks to the other. The conversation is…

A: We have d= 2.5 m u= 343 m/s c=3×108 m/s

Q: Which of the following will emit an EM WAVE? Choose all that apply. A positive ion that is speeding…

A: The emission of the electromagnetic waves is caused by the accelerating ions. To accelerate the…

Q: In the Michelson-Morley experiment of 1887, the speed at which light traveled through vacuum in…

A: Michelson-Morley experiment was conducted to check the presence of a hypothetical medium called…

Q: Two astronauts are 1.30 m apart in their spaceship. One speaks to the other. The conversation is…

A: The time it takes for sound waves to travel at 354 m/s through the air between the astronauts is,

Q: We use spectroscopes to help us determine the type of electromagnetic wave O the age of the object O…

A: spectroscopy is used widely by scientists to study distant objects like black holes, stars and…

Q: If a galaxy moving away from the Earth has a speed of 1000 km/s and emits 656 nm light…

A: The relative velocity between the observer and the source, v=1000 km/s=1×106 m/s   The wavelength of…

Q: gih of 700nm, to If the driver gets pulled over for running the red light, do they have an…

A: We have ,  ∆λ=λ-λ0=500 nm-700 nm= -200nm , the wavelength is decreased by 200nmmaking it appear…

Q: How long will it take, for the sunlight to reach the earth surface, if the sun is 1.497 x 101'm away…

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Q: The vector direction of the electromagnetic field in a propagating light wave is called a. the…

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Q: What is the wavelength, in fm (femtometers, or 10^-15 m), of a proton travelling at 90% of the speed…

A: The speed of the proton is:

Q: ) A frequency spacecraft moving away from Earth at 0.97 c transmits data at a rate of 10^4 pulses…

A: Given data: The speed of the frequency spacecraft is u=0.97c The rate of transmission is f'=104…

Q: A light source moving toward an observer will appear to be at a higher frequency than its actual…

A: When a source emitting waves approaches the observer, the number of waves that reach the observer…

Proper Length

The theory of special relativity explains the connection between space and time to objects that move in a straight line at a constant speed. The objects move at the speed of light. When an object approaches light speed, its mass is endless and cannot move faster than light. The most crucial postulate of Einstein's special relativity is that the laws of nature do not change in each frame of reference.