How does radar work? How to find hidden objects? [Techhab interpretation!]
Imagine thinking of landing a huge plane in a crowded town on a dark night-but the problem is that there is a covered area around the fog, so how do you land the plane safely to find the empty space? You can not see anything! Plane pilots solve this problem using a device called radar;It helps to see an object hidden using a viewing medium or high radio wave. During World War II, one of the main improvements was made to fend off enemy aircraft. But today it has wide usage. Aircraft pilots use it when leaving a plane, while on air and while landing the aircraft. The police used it to detect bikes or cars running illegal speeds.Even to get a map of the world and other planetary satellites, NASA uses Radar to know the location of satellite. So let's learn more about how it works ...
What is radar
We can see any objects in this world due to light, which comes from the sun and reflects on the object and it comes to our eyes. Again, if you want to move to a place at night, then you can walk properly using the torch lights to illuminate the road.The light from the torch comes in front of the object and the light from the object reflects in our eyes; The result is to see the object. From the level of reflection of light and reflection of light, your brain can easily understand how far you are from an object and can move it easily to any passage accordingly.Radar works very much on the same subject. The word "radar" means that the meaning of the radio detection and ranging-and's name gives a lot of misconception, what does it work on. Suppose a plane pilot is moving along its plane in a dense fog, but he does not see where he is going, in this situation it helps them.
How does radar work?
No matter what the planes, trains, water vessels and wherever it is planted, it makes some rules unobtrusive and works using the same type of equipment. There are some components that help to generate radio waves, some parts help to throw that wave in the air, accept some returned waves, and some parts help in displaying various information so that its operators easily understand all the information.
The radio waves that are used in the radar are produced by a device called "Magnatron". Radio waves and lights can pass in the same speed; But the waves of the radio waves are very long and the frequency is very weak. The wave length of the light wave is 500 nanometers (1 meter to 500 billion times smaller), and the radio wave used in the radar is more than a million times the amount of light wave.
Both light and radio waves are but part of the electro magnetic spectrum, which means that electrical and magnetic energy exists between them and they are thrown into the air. Magnetron actually creates a microwave that is similar to the microwave. There is a difference between micro ovens; The wave generated by magnetrons can be sent up to several miles, meaning that its waves are strong enough.
Once the radio wave is created, there is an antenna that acts as a transmitter and sends the wave to the front space. The radar rotates so that it can handle reflections from a large area. The radio wave spreading from the radar ran at the speed of light until it was tied somewhere. The waves reflected in connection with an object are returned at the speed of light. And this wave speed is certainly necessary,Suppose the enemy's aircraft is moving forward in 3,000 kilometers / hour, then there must be a fast system to catch it. After that the wave comes back to the delivery device and the alarm sounds. There is no problem at the time, Kenna's speed is equal to the speed of light, ie, if an enemy's plane is 160 kilometers away, then it will take 1 thousand times less than 1 second to detect it and return it to the wave radar.
How to avoid radar?
The Radar is used with the dominant authority to detect enemy aircraft. But once you have a super-radar technology, which is capable of detecting any hidden objects, but surely your enemy also has it. If you have the ability to detect your enemy aircraft, your enemy surely has the ability to recognize your aircraft. In this situation, we need a plane that can secretly and hide it, and certainly not caught in the radar.The American Air Force has an ill-shaped aircraft named B2; The structure of this plane, which can absorb the beam from the radar, can not detect the radar any more.