they had oil lanterns and candles.
Edison's best light bulb stayed lit for around 40 hours. This experiment took place in 1879.
The duration that a fruit can power a light bulb will vary depending on the type of fruit and the size of the bulb. Generally, fruits can power a simple LED light for a few hours to a few days.
60 days is 24x60 hours, so the energy used is 60x24x60 watt-hours, 86400 watt-hours or 86.4 kilowatt-hours or units. If it is a 60-watt incandescent bulb it could be replaced by a 12 watt low-energy bulb, and in the same time that would use only 17.3 units, saving 69 units costing about £10.
In the olden days, people measured temperature using instruments like thermometers filled with mercury or alcohol. These thermometers relied on the expansion and contraction of the liquid to indicate temperature changes. Other methods included using simple devices like a thermoscope or relying on behavioral changes in animals or nature to gauge temperature.
In the good ol days when it got dark all you had to read by was a candle or some sort of oil light not usually very good for the eyes,so the y helped protect and preserve eye sight. They made self education far easier. they led to more people having a time to read in the days of long working hours this was a great thing. electric light was safer and healthier. and made the environment that people lived in safer.
in the olden days we used smoke,light reflection and beacons
Its basically a light but in the olden days.
It all depends on what sense you are speaking of; because in the "olden days," as you say, candles were used in order to provide some light in dark places.
Takes 300 hours for the average light bulb to burn out
what were shops like in the olden days
yes they did have needles in the olden days
Sunlight, obviously. Fire: candles, lamps, torches, etc.
Please define "olden days" because each time had different things. To some people 1950 is the "olden days".
Why was an oasis surrounded by a wall in the olden days
Takes 300 hours for the average light bulb to burn out
A flourescent light bulb lasts between 6000 to 18000 hours.
He invented the incandescent light bulb and it took him 12 years.