Light and Bulbs Quiz

What is the main component of an incandescent bulb that glows to produce light?

• Mercury vapour

• Phosphor

• Glass tube

• Filament

What is the purpose of the white powder called phosphor in a fluorescent bulb?

• To store energy

• To emit visible white light

• To conduct electricity

• To emit ultraviolet radiation

What is the difference between phosphorescence and fluorescence?

• Phosphorescence emits light for a long time after the source of radiation has stopped, while fluorescence emits light only while ultraviolet light is hitting it

• Phosphorescence emits light only while ultraviolet light is hitting it, while fluorescence can emit light for a long time after the source of radiation has stopped

• Phosphorescence emits light only while ultraviolet light is hitting it, while fluorescence cannot emit light for a long time after the source of radiation has stopped

• Phosphorescence emits light for a long time after the source of radiation has stopped, while fluorescence cannot emit light only while ultraviolet light is hitting it

Why are most light bulbs often called 'heat bulbs'?

• Because they produce more visible light than heat

• Because they produce more heat than light

• Because they produce more ultraviolet radiation than heat

• Because they produce more infrared radiation than heat

What is the most important natural source of light on Earth?

• Fluorescent bulbs

• Sun

• Incandescent bulbs

• Fireflies

What is the term used for the production of light by living organisms?

• Phosphorescence

• Bio-luminescence

• Incandescence

• Fluorescence

How do fish living deep in the ocean create their own light?

• By having bacteria in their photophores that do the light-producing chemical reaction for them

• By producing ultraviolet radiation

• By using electric light

• By using phosphorescent materials

What is the purpose of the long spine with a bulb on the end in the black sea dragon and the angler fish?

• To conduct electricity

• To attract smaller fish into their waiting jaws

• To emit ultraviolet radiation

• To produce heat

How do flashlight fish use light from their photophore?

• To emit ultraviolet radiation

• To produce heat

• To keep their school together as they swim

• To attract predators

What is the term used for the light produced by a chemical reaction in living organisms, which gives off no waste heat?

• Incandescent light

• Fluorescent light

• Hot light

• Cool light