The Light Bulb | Baamboozle - Baamboozle | The Most Fun Classroom Games!

English 17 Public

Working of the Incandescent Bulb and Fluorescent Bulb

Study Slideshow

What is the Normal round Glass bulb called?

Incandescent Bulb

What is the thin coiled wire inside the bulb made of?

Tungstan

Will Tungstan normally react with air ? What does it become?

Yes, it react with air to form Tungstan Oxide

So, how do we make sure that tungstan doesn't react with air?

Fill the bulb with a non reactive gas called Argon

What kind of a gas is Argon?

It is an Inert/ Noble Gas. It is Non-reactive

To what temperature does the bulb normally rise to?

2000 degrees centigrade

What different colors does it emit when you turn on the bulb?

First red, then orange, then yellow, last white

Why isint the Incandescent bulb used a lot today?

Because 90% of the light it emits is lost in Infrared light

Can we see Infrared light? Give reason

We cannot see that part of the EMS in which it lies

What is an electrode?

It is a conductor through which electricity leaves

What do electrodes do?

They let out a lot of electrons into the tube

What is a CFL bulb made of?

A pair of electrodes, and a tube made of an unreactive gas, a bit of mercury vapour & a phosphur coating inside

What is Mercury?

It is a liquid Metal found in Thermometers

What do the electrons do to the mercury vapour?

It excites the mercury vapour transferring a lot of energy into the mercury atoms

What form of energy/light is released from the mercury vapour?

UV light

So, how do we finally see objects through a CFL bulb?

The UV light emited by the mercury vapour, is transferred to the fluorescent surface to produce light