Worksheets12.3 Producing Light Section Questions
Total questions: 10
Worksheet time: 16mins
A light generated by heating a piece of metal until it glows is known as ?
Coherent Light
incandescent light
Incoherent light
Fluorescent light
This type of light is generated by using phosphors to convert ultraviolet radiation to visible light.
Coherent Light
Incandescent Light
Incoherent Light
Fluorescent Light
____ is light only one wavelength that travels in on direction with a constant distance between the corresponding crest of the waves.
Coherent Light
Incandescent Light
Incoherent Light
Fluorescent Light
____ can have more than one wavelength, can travel in more than one direction and does not travel with a constant distance between the corresponding crests of the waves.
Coherent light
Incandescent light
Incoherent light
Fluorescent light
What are the two main types of bulbs found in your home?
Incandescent Lights
Ultra violet Lights
Fluorescent Lights
Strobe Lights
Mark any of the advantages of using a fluorescent bulb instead of incandescent bulb.
They Last Longer
They are brighter
They use more energy
They use Less energy
Identify any uses of a laser
Read CD's
Use in Surgery
In light Shows
As a pointer
If 80 percent of the energy emitted by an incandescent bulb is thermal energy, how much thermal energy is emitted by a 75-W bulb in one second?
60 J
54 J
66.7 J
6.7 J
A 25 W fluorescent light emits 5.0J of thermal energy each second. What is the efficiency of the Fluorescent light?
*Hint ( Energy out / Energy in x 100 for percent)
20%
120%
80%
50%
What is a part of the body that lasers are commonly used for surgery?
Hands
Hamstrings
Ears
Eyes
