H00: How Lighthouses Work...

Figure H00: The lantern of the South Stack lighthouse in Anglesey, September 2013.

Our site contains a complete description of how lighthouses work since they were first used before the days of recorded history.

Clearly they work with light, so this section begins with material about:

The nature of light and its properties;

How light is created;

How light is controlled and used in lighthouses;

Some calculations relevant to light visibility.