How does RADAR work? It's a bit like shouting very loudly at a cliff and waiting for the echo to come back to you. Whether you use rude words or not is completely up to you.

RADAR is emitting a sound wave and waiting for the echo to come back to you. By timing the returning echo you can work out where exactly another object is.

The really interesting thing about radar is if you use multiple angled receivers you can work out the position and height of a target. This technology was essential in winning the Battle of Britain in 1940.

But that was 1940, what about radar now? Is it as defunct as the 3 ½ inch floppy disk? Well, no actually. Radar is still pretty important in the military but the technology is a lot more advanced. In fact each time you connect to a sat nav to figure out where you are, you are using the network of satellites that calculate your position using the same principles of radar.

Thanks to Alyssa Ann for her portrait of Jeremy Clarkson: http://alyssamenold.com/

Why not have a look at James' vid on now sat navs work:    • Satellite Navigation: HOW does it Wor...  

Or Why not check out Greg Foot's vid on whether humans will ever be able to fly:    • Will Humans ever be able to FLY? | Gr...  

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