What is light BBC Bitesize?

BBC Bitesize What is light? We need light to see. Light can come from many different sources, such as the Sun, stars, torches, lamps and candles. Some sources of light are so powerful that they can damage our eyes if we directly look at it. That's why we often need sunglasses.

What does a bit represent?

The bit represents a logical state with one of two possible values. These values are most commonly represented as either "1" or "0", but other representations such as true / false, yes / no, on / off, or + / − are also widely used.

What do you call objects that block light?

Seymour: like this glass of water! Albert: We call these objects transparent. But some objects block light… Seymour: like this wooden spoon… or this bowl of cereal. Albert: We call these objects opaque. If light can’t go through an object, it creates a shadow! But sometimes you get special objects that light bounces off…

What is a bit in a programmable logic array?

In certain types of programmable logic arrays and read-only memory, a bit may be represented by the presence or absence of a conducting path at a certain point of a circuit. In optical discs, a bit is encoded as the presence or absence of a microscopic pit on a reflective surface.