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What’s on TV tonight ? why ? Nothing but hundreds of lines filled with millions of spot of light ! This doesn’t sound like anything you you would recognise. But that’s what makes up the picture you are watching!

To find out where the TV picture comes from, we have to go the TV picture comes from, we have to go to the TV studio. In the studio a cmera points at some actors. A part of the camera makes an alectrical copy of the scene on asort of light into strong or weak aports of electricity.
Then another part of the TV camera reads the spots of electricity. It zips backward and forward across the scene in lines, just as you are reading the lines on this page. But imagine reading about twenty five pages a second, aeach one with over 500 lines ! That’s how fast a tv camera reads the scene.
As each line is read, electric signals are sent from the TV station to yor set. These signals make part of your TV shoot strong or weak bursts of tiny particles called electrons at the screen. The more electrons in each burs, the brighter yhe spot of light on the screen. exactly in step with the TV camere. So There’s your TV picture, made up from thoousands of lines filled with millions of spots of light.
But wait a minuite-what about the colour? That’s easy-if you remember that all the colours in light can be made by mixing red, blue and green.
So, a colour TV camera seperates eadh of the three colours from the scene, your colour TV set has three electron guns-one of each colour, and the screen can glow in tiny spots of the three colours-to give any colour you like.!