Part BVolume 1Chapters 7–9
Turning Bits Into Meaning
How switches become numbers, and numbers become text, pictures on a screen and sound in the air.
3 chapters44,223 wordsabout 3 hours reading
Part B chapters
7
Numbers and Meaning - Binary, Text and Unicode
You will be able to explain why computers count in twos, and convert any number to binary and back by two different methods.
16,708 words/73 min read8Pixels, Screens and How You See an Image
You will be able to say what light is, and why your eye sees a slice of it. You will be able to explain why three colours can fake millions.
11,583 words/50 min read9Sound, Magnets, Speakers and Phone Calls
You will be able to say what sound physically is, with numbers. You will be able to draw a speaker and name every part in it.
15,932 words/69 min read