how do you turn a light on?

Answer 1

lick its ear and whisper sweet nothings to it

Answer 2

A lighting circuit is in esscence very simple. There are 4 components: A power suppy, a switch, a bulb (or ther lamp) and intrerconnecting wiring.

In a typical home installation the power supply is provided by the mains at 240VAC (or 110VAC if you live on the other side of the pond). This travels down copper wires to a switch, which is basicly a lever with a copper contact on it, which when moved touches another 'fixed' contact. When these contact touch, electricity flows through the switch. The bulb is just a coil of wire in a protective glass housing. When electricity is passed through a wire, it casues heating in the wire, the thinner the wire, the more heat produced. A lightbulb has a very thin tungsten wire, tungsten is used as it can withstand very high temperatures. When it reaches a very high temp, it glows, the hotter is t gets, bthe brighter it glows, and the whiter it appears. The connecting cable simply completes the loop (hence why it is called an electrical circuit).

This applies to all fillament lamps, flourescent lamps are slightly different, typing flourescent lamp into Wikipedia will give you a better description than I could.

Answer 3

you turn on light by closing the circuit. An electrical circuit works only when it is closed and that is done by the use of a switch. In a typical filament bulb circuit when u keep the switch 'ON' the electrons from the energy source(battery or power station) flow through the filament of the bulb. The filaments are made of materials like 'tungsten' which has a high melting point and glow when electricity is passed through it. In this process heat is also produced. This is typical example of conversion of electrical energy to heat & light energy. However in fluorescent lghts the free electrons excite the electrons of the vapour(mercury, halogens etc..) inside the bulb which in turn glow the fluroscent coating on the inside surface of the tube. They typically exhibit their own spectrum.

Answer 4

If the light is already on, then any action that does not turn the light off could be considered turning the light on.

As long as you define turning the light on as any action that changes the state from "initial state" to "light on".

Answer 5

An electric one, right?

The switch is a thingy to break the circuit that provides electricity to the lighting device.

If the switch is OFF, it breaks the circuit and you get no light.

If it's ON, the circuit is completed (electricity flow is unbroken through wires to device) and the light comes on.

As to how the electricity gets there...that's more complicated.

Some kind of plant makes electricity, and it goes along wires to your house. As to the specifics...I'm a little fuzzy on how that works. Something with metal and electrons and Tesla...I'd have to look it up.

Answer 6

Well it depends on what type of lamp or light you have. In my room I have a touch light that turns on when You touch it. and then on the other side of the wall if the light is plugged in all I have to do is turn the switch on. or theres clappers so you just clap.

Answer 7

perhaps you meant light bult.
A light bulb is simply a small metal wire that is glowing with heat.Electricity flowing through the wire causes it to heat up. This heat makes it glow. It heats up because of a concept called resistance. When electricity passes through something, the substance it is passing through tries to hold on to the electrons. The electrons have to be forced through. Some of this force is absorbed by the metal and given off as heat. As the filament heats up, it gives off light.

Answer 8

when I come home I just feel on the wall untill i have the switch
next I push

In the morning ehen I come out of bes I walk in the dark to the wall and find with my hands the switch on the wall , its at the right side of the door. then I push

Answer 9

its not possible to turn on light as the definition of "light" is something radiating light energy from a source ...hence if its off then its not light

Answer 10

are you referring to the light from lamps, if you are then by pressing / flipping the switch or tapping the metal (if it's a touch lamp).

Answer 11

the switch. unless its like powered by kinetic energy or something, in that case, connect it to a bicycle thing you get at the gym and then pedal on it.