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lifesaver
Give 15 points!
Oops!
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gold
Win 50 points!
Okay!
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fairy
Take points!
5
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25
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thief
Give points!
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15
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What is the thin coiled wire inside the bulb made of?
Tungstan
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15
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What do the electrons do to the mercury vapour?
It excites the mercury vapour transferring a lot of energy into the mercury atoms
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15
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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
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15
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What converts the UV light to visible light?
The fluorescent phosphur coating inside the tube/bulb
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What is the Normal round Glass bulb called?
Incandescent Bulb
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Why isint the Incandescent bulb used a lot today?
Because 90% of the light it emits is lost in Infrared light
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15
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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
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What is an electrode?
It is a conductor through which electricity leaves
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banana
Go to last place!
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magnet
Take 25 points!
Okay!
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shark
Other team loses 25 points!
Okay!
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baam
Lose 10 points!
Oops!
15
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So, how do we make sure that tungstan doesn't react with air?
Fill the bulb with a non reactive gas called Argon
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banana
Go to last place!
Oops!
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seesaw
Swap points!
Okay!
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rocket
Go to first place!
Okay!
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thief
Give points!
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15
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What is Mercury?
It is a liquid Metal found in Thermometers
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What kind of a gas is Argon?
It is an Inert/ Noble Gas. It is Non-reactive
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Will Tungstan normally react with air ? What does it become?
Yes, it react with air to form Tungstan Oxide
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15
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To what temperature does the bulb normally rise to?
2000 degrees centigrade
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