How Does Radar Work?

The Word Radar power-up allows you to see the spots where words can be played . When using this it will highlight the spaces on the board in green. Sometimes this is not very helpful if there are too many places to play a word. But, it can help if you do not have good letters or it is late in the game.

We all know what radar is, but how does it work? Well, the concept is actually quite simple. It’s all about echoes – or more specifically, radio waves bouncing off solid objects and returning to a receiver.

To understand this concept, think about shouting at a cliff. As the sound waves produced by your voice reach the surface of the rock face, they come bouncing back to you. This phenomenon is known as an echo, and it’s the same principle that radar is built on.

The radio waves used in radar are sent out from a transmitter and then bounce back when they hit a solid object. By measuring the time it takes for the waves to return, the distance to the object can be calculated. By using multiple receivers at different angles, the position and height of the object can also be estimated.

The military was the first to spot the potential of radar technology, using it to detect enemy ships and airplanes. The British Chain Home system was one of the first radar systems to be developed, using a fixed antenna array to send out a wide beam of radar energy. The time between the signal and its return, based on the known velocity of radio waves (the speed of light), enabled distance to be worked out.

As technology advanced, more powerful radar systems were developed. The Doppler radar was one of the biggest developments in radar technology. This enabled a system to detect the speed of a moving object without having to wait for two separate pulses to hit it and be bounced back.

The Doppler effect is the way in which the pitch of a wave changes according to the relative speed of the object it bounces off. This effect is used in Doppler radar to calculate the speed of an object.

In conclusion, radar is all about echoes. By sending out radio waves and measuring the time it takes for them to bounce back, radar systems can determine the distance, position, and speed of an object. It’s a technology that has been crucial in many fields, from military defense to weather forecasting.


What does radar do in Words With Friends?
One of the most popular Power-Ups in the game is the Word Radar. Word Radar highlights all the places it is possible for you to play a word using your current tile rack. You could use Word Radar if you're unsure of where to play the next word or when you're trying to predict your opponent's next move.
How do I get word radar on Words With Friends?
Tap the Word Radar icon, it's green with a radar-like graphic. The areas where you can play words will be highlighted in light green. Once you've activated Word Radar, it's in effect until you take your turn, even if you leave that particular game or the app. You can turn it off by clicking the Word Radar icon again.
What is the green icon on Words With Friends?
Wondering what the green dot on a user profile means? It's simply an indicator that the player is online in Words with Friends. If you see a player online, nudge them to make a move or start a new game!
How do you use word radar in word Wars?
Playing a Word Radar Whenever you're having a hard time coming up with a good move — or any play — tap on the Word Radar icon (the green symbol). Afterward, parts of the board will have a green highlight, which shows you where you can place letters.