Please Help! How long does it take a radio signal traveling at the speed of light, c=3.00×105km/s, to go from Earth to Mars at this time?
When Mars is on the opposite side of the Sun from Earth, it is about 4.0×108km away. How long does it take a radio signal traveling at the speed of light, c=3.00×105km/s, to go from Earth to Mars at this time? Be sure to give your answer with the appropriate precision. 0.00075 second 1300 kilometers 1300 minutes 22 minutes 1333.33 seconds Thanks!
Astronomy Question about radio signal traveling at the speed of light?
So, the speed of light is about 300,000 km/sec. At a minimum distance it's 56,000,000km / 300,000km/sec = 186.6 seconds (about 3 minutes, 7 seconds up to 400,000,000 / 300,000 = 1333.3 seconds, or about 22 minutes, 13 seconds
Have you ever tossed a small rock into a pond or very still lake? How far do the ripples go? Bigger stones make bigger ripples that go farther before they dissipate into nothingness. And if the water is very still, we see the ripples travel much farther than if the water is choppy from winds or crashing waves.As best we know, it is much the same with radio waves, which propagate as ripples through the seemingly empty void of space. But whereas the ripples in the water are caused by the displacement of water molecules, radio wave ripples are “photons” - energy packets that act both like waves and particles. The ripples in water are no longer visible when the energy they contain is lower than the random vibrations of water molecules, and the radio waves are no longer detectable when their energy is lower than that of the other more-or-less random background electromagnetic radiation (at least when we use very basic radio receivers; sophisticated receivers can extract signals below this threshold, but ultimately we reach the point where the radio waves are much too low in energy to be detected by present-day technologies).If you really want to investigate some of the more recent discoveries, look up “Higg’s Field”. Then look up “luminiferous aether” to see how our discoveries sometimes redefine old “debunked” notions.
Whatever amount of it that escaped the Earth's atmosphere (most radio waves don't) and was not absorbed by material in the way (dust, gas, asteroids ... whatever) will by now be 30 or so light years out. It will be undetectable by all but the most advanced technology imaginable, because of the Inverse-square law.
How fast does radio signal travel?
Radio signal travel through a vacuum is the same as the speed of light (299,792,458 metres per second). It propagates through air (atmosphere), ≈ 90 km/s slower than c. Through transparent materials is ≈ 200,000 km/s. Earth-Mars Radio communication varies in speed, depending on the distance between them. The farthest distance between them is approximately 378 million km. Their closest distance: 78 million km. Radio wave would take between 4.3 minutes to 21 minutes. When Curiosity Rover Lands on Mars it was approximately 247,838,976 km away from earth. So yes, earth-mars communication will take a delay of about 20 mins.
How long does it take one signal from space to travel 3 billion light years away to get to earth?
WHAT signal? a LIGHTY BEAM (like a laser) of a radio signal( whihc travels at the speed of l;igth) would BOITh take 3 billion years travel 3 billion light years!
How long does it take signal to travel to a point in space?
Perhaps a little more explanation: The problem appears to really be a distance value of 1.5 x 10^11, and speed is 3 x 10^8. The equation you need is: distance = speed x time which we solve for time to get time = distance / speed So the time will be ( 1.5 x 10^11 ) / ( 3 x 10^8) which you can easily do with a calculator. But, if you need to do it by hand, keep reading. 1.5 x 10^11 / 3 x 10^8 = 1.5 x 10^3 / 3 (cancel 10^8 top and bottom) = 0.5 x 10^3 (divided the 1.5 by the 3) = 5 x 10^2 (make it a normal scientific notation number) = 500
How long does a radar signal take to travel from Earth to Mercury and back when Mercury is at its closest point to Earth?
A crude (back of the envelope) calculation: Mercury has orbit at 0.4 AU. With that its closest approach is at (1 - 0.4) AU = 0.6 AU. @ 500 seconds/AU, 0.6 x 500 = 300 seconds [300 Light seconds distance] which would be 5 minutes. For a round trip, it would be 10 minutes. REMEMBER, Radar waves travel at the speed of Light as both are Electromagnetic waves, in Space. A refinement: As Mercury (at 0.3871) has a peculiarly high Elliptic orbit with eccentricity, e = 0.2056. The closest approach would then be 1(1 -0.167) - 0.3871(1+0.2056) = 0.36631 AU. @ 499 seconds/AU (more accurate value), it would be 365.5775 seconds =6 minutes 5.58 seconds; for the round trip (Earth would've moved 11 km).
The definition of a light-year is the distance light travels in a year in a vacuum. So a signal from the electromagnetic spectrum (light, radio, X-Ray, cosmic rays…) would take 1 year to travel a light-year. In some medium such as air or water, it would appear to take longer. The photons would bounce around in the medium making their journey appear slower (although it’s actually farther).Sound would take a lot longer since it is a compressional wave that moves through a medium. At sea level the speed of sound is about 343 meters/sec (767 mph). The speed of light is 3x10^8 m/sec or 186,000 mi/sec so if you shout at someone 1 light-year away it will take about 1 million years for them to hear you. They probably shouldn’t wait. Also, it would be really hard to find a medium you could stretch over a light year.If you send a message by boat it would take even longer.There are things that are faster than light (e.g. phase velocities) but these are not things that can actually carry information. We don’t know how to make wormholes through space-time yet so the fastest you could send a message to someone 1 light-year away is 1 year.
First of all, Radio waves, light waves, microwaves, gamma rays, etc. are all forms of ‘electro-magnetic radiation’ and are identical, except in their wavelength, so radio waves get to the moon just as fast as ‘light’, etc. The moon is 239,000 miles away, so there and back is 478,000 miles. So how many times does 186,000 (a light-second) go into 478,000 (total miles traveled by light)? Roughly 2.57 seconds.Figuring out how long it takes light to get from the Sun to the Earth is really easy, the numbers just happen to work out perfectly! One A.U., the avg. distance from Earth to Sun (or, the radius of Earth’s orbit, if it was circular, which it almost is…close enough for this discussion) is 93,000,000 miles. So, the diameter of the orbit would be twice that: 186,000,000 miles. So, since light travels at 186,000 m/sec., it takes light 1,000 seconds to traverse the diameter of our orbit, or half that long for the radius: 500 seconds, which is 8 min., 20 sec. (not that you asked, I just thought it was interesting!)