Radar waves are electromagnetic waves that are emitted from a radar device. They have the ability to detect objects such as airplanes, ships and vehicles at a distance. The distance they can travel depends on how high in the sky they are sent out from, but for this article we will use 30 kilometers (about 18 miles). At what size do these radar beams come back? To find out, let’s start by looking up what is the diameter of a circle given its radius. Once we know this information, it will be easy to calculate what the diameter of our radar beam would be!
The formula used to determine the area of a circle with radius r is 𝛽A = πr² or A=πr².
The diameter of a circle with radius r is twice the length of its circumference, which can be found by multiplying πr and pi or C=π(√r). Now we know what the width of our radar beam would be! Let’s find out how long it takes for these waves to come back: 𝛽T = √[C/c] where c represents light speed (299792 km per second) and T stands for time in seconds. This calculation results in us finding that at 30 kilometers away from an airplane, our radar beams will return after about 11 minutes and 43 seconds!
Radar waves are electromagnetic waves that have the ability to detect objects such as airplanes, ships and even birds. The wavelength of a radar wave ranges from about three feet to six miles long, and the power level can range anywhere from below one millionth of a watt to hundreds of millions or even billions!
It is possible that because these waves have an electromagnetic property, they are able to penetrate obstructions such as trees; this may be why some people think that airplanes get “lost” on their screens when foliage covers them up. However, it’s not all just speculation- there is evidence in favor for this theory too. For example, at night time with heavy fog covering many structures like buildings and cars (which act as obstruction), lights could be seen coming through what would otherwise appear to be total blackness. This proves that without obstructions, radar has the power to penetrate what would otherwise be a dense fog.
The radius of these waves is determined by how much energy they have and where they are coming from- for instance, those that come form an airplane at high altitude will definitely look different than ones emanating from your front porch! There are plenty variations in this type of technology so it’s important to know what you’re looking at before making any assumptions.
At 30 km (18 miles) away, the diameter could range anywhere between three feet long to six miles long with the power varying anywhere from below one millionth watt up through billions! It might seem like a lot but it’s actually not really all that bad when considering there are many angles and variations on this technology.
In a dense fog, the radar beam can be similar in size to that of an airplane’s landing light and at greater distances will have a diameter comparable to the height from which you are viewing it. It all depends on how powerful your radar is!
Radars work by sending out pulses of electromagnetic energy which bounce off any object they come into contact with and return back to their source where they create what we know as a “radar picture.” The more power, the farther these beams go but there are plenty variations in this type of technology so it’s important to know what you’re looking at before making any assumptions. At 30 km (18 miles) away, the diameter could range anywhere between three feet long to six miles long.