Types of Light

Question 1

How is Fluorescent light created (by other energys)?

Answer 1

Fluorescent light is created by electrical energy and chemical energy.

Question 2

Is Fluorescent light more or less efficient and economical than other types of light?

Answer 2

Fluorescent light is more efficient and economical than other types of light

Question 3

When is Fluorescent light created?

Answer 3

Fluorescent light is created when particles absorb ultraviolet light, and emit it as visible light

Question 4

Energy transformation:

Answer 4

Ultraviolet light energy > energy absorbed by particles > visible light energy

Question 5

What is the process for Fluorescent lights?

Answer 5

In a Fluorescent light, electrical currents cause mercury vapour in a glass tube to emit ultraviolet light (this is area, which is then absorbed by a phosphor coating on the tube. This coating them emits energy in the form of visible light)

Question 6

What does CFL stand for?

Answer 6

C - Compact
F - Fluorescent
L - Light bulb

Question 7

What is the process for CFL lighting?

Answer 7

In a CFL electricity travels through a small spiralling tube that is filled with mercury vapour. The mercury vapour emits ultraviolet radiation which is absorbed by a phosphor coating, which then emits energy in the form of visible light

Question 8

When is Incandescent light created?

Answer 8

Incandescent light is created when an object is heated to such an extreme temperature that large amounts of visible light energy is emitted (thermal energy is converted to light energy)

Question 9

What is the process of an Incandescent light?

Answer 9

In an Incandescent light bulb, electrical currents heat up a metal wire/filament, this extreme heat results in the emission of energy in the form of visible light

Question 10

Energy transformation (Incandescent):

Answer 10

electrical energy > thermal energy > visible light energy

Question 11

TRUE or FALSE - Incandescent light use minimal energy but last very long

Answer 11

FALSE - They use a lot of energy, and don’t last long

Question 12

What does LED stand for?

Answer 12

L - Light
E - Emitting
D - Diodes

Question 13

3 reasons why LEDs are better than other light bulbs

Answer 13

1.LEDs last longer,
2. They use less energy
3. They produce more light than any other light bulb

Question 14

What is the process of LEDs?

Answer 14

In an LED light, electrical currents flow through semiconductors called diodes. Inside the diodes, electrons combine with holes, which in turn causes the emission of visible light

Question 15

Different types of LEDs emit different types of _________________

Answer 15

wavelengths

Question 16

Does having semiconductor diodes give more or less light?

Answer 16

LED light bulbs contain many semiconductor diodes, so large amounts of light is produced

Question 17

What is Bioluminescence?

Answer 17

Bioluminescence is the emissikn of lughy produced by chemical reactions that occur in the bodies of living organisms

Question 18

How does Bioluminescence work?

Answer 18

In the bodies of these organisms, certain chemicals react together, which results in the emission of visible light

Question 19

What are 2 examples of animals with Bioluminescence?

Answer 19

Fireflies and Comb Jellyfish

Question 20

What is Chemiluminescence?

Answer 20

Chemiluminescence is the emission of light resulting from chemical reactions (not involving heat energy)
(not within the body of an organism)

Question 21

Name an example of Chemiluminescence

Answer 21

An example of Chemiluminescence is the light produced by an active glow stick