Mon Prof Augmenté
Three Lamps on One Street
For most of history, streets at night were lit by candles and oil lamps, then by gas, and later by electricity. Each new light burned brighter and reached further, so people could walk and work outside after dark.
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Age 12: open this week
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In the picture
- A doorway lantern with a candle flame: a small warm orange light that reaches only a few paces
- A gas lamp head on an iron post: a bright flame with a pale blue base that lights a longer stretch of street
- An electric streetlamp globe: a steady, even, pale light that covers the widest area
- A pedestrian in the lamp light: a person passing safely after dark under each kind of light
Examples
- A camping lantern burning on a table
- The streetlights on your road switching on at dusk
Key takeaways
- In the 19th century, gas replaced candles and oil in city streets.
- Electric lamps reach further than a flame and do not blow out in the wind.
Carry on in the app
Three questions on this lesson. It has left the free week, so its quiz is for subscribers.
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