PSC 1121 - Chapter 7: LIGHT With 149 Exam Ques ons
and answers New edi on
A scien st might model light as electromagne c waves to understand how an incandescent
lightbulb works. She might model light as rays to Blank__________.
- design the op cs of a microscope
- understand the reflec on from a glass window
An object that produces light is said to be ____________.
Blank 1: luminous
Filament lightbulbs, the wires in a toaster, and a fire are all examples of ___________ light
sources, which produce light over a wide range of wavelengths.
Blank 1: incandescent
In the produc on of light by an incandescent source, internal heat moves par cles that make up
the glowing object. The moving nuclei and electrons Blank______.
disturb the electric and magne c fields in the material, crea ng electromagne c radia on
Reason:
Accelera ng charged par cles create electromagne c waves. The ho*er the object, the more
accelera on occurs, and the more light is produced.
Visible light is only a small part of the en re ___________ spectrum, which is shown in the
figure.
Blank 1: electromagne c
Match the model of light to what it can be used for.
- Electromagne c wave model --- Explain the genera on of light at a source.
- Represen ng light as a ray ---- Predict the angle of a reflec on off a mirror.
- Par cle model ---- Explain light as individual packets of energy.
Objects that are luminous ___________.
produce light
,Rank the different types of electromagne c radia on by their frequency, with the lowest
frequency on the top.
1. Radio Waves
2. Infrared Light
3. Visible Light
4. Ultraviolet Light
5. X Rays
6. Gamma Rays
Select all the choices that are incandescent light sources.
- The Sun
- A candle
An animal or plant that is bioluminous can produce visible ____________.
Blank 1: light
The light produced by incandescent light sources is generated by _____________.
accelera ng electric charges
True or false: All objects with heat produce blackbody radia on.
True
Reason:
For objects at "room temperature," this radia on is mainly in infrared wavelengths, so they do
not appear to be glowing unless you use special cameras.
The figure shows the Blank______.
electromagne c spectrum
Select all that occur as the temperature of an object emi=ng blackbody radia on increases.
- More light is produced.
- The peak of the emission shi>s to bluer (shorter) wavelengths.
A scien st might model light as electromagne c waves to understand how an incandescent
lightbulb works. She might model light as rays to Blank______.
- understand the reflec on from a glass window
- design the op cs of a microscope
, The temperature needed for an object to glow red is Blank__________ the temperature needed
for an object to glow white.
lower than
Match the type of electromagne c radia on with its frequency and common use(s).
- Microwaves ---- Lowest frequency; cellular phones, broadcast television, cooking
- Infrared light ---- Second lowest frequency; remote controls, night-vision equipment
- X rays ---- Second highest frequency; dental and medical imaging
- Gamma rays ---- Highest frequency; medical treatments
Plants and animals that emit visible light are said to be Blank______.
bioluminous
Sunlight is primarily made up of Blank______
infrared radia on
Incandescent light sources produce _____________ radia on, which is shown in the graph.
Blank 1: blackbody
If you were designing a microscope or telescope, the _______________ _____________model
would be helpful for tracing light's path through the device.
Blank 1: light
Blank 2: ray
The graph shows the blackbody emission from three flames that are the same size. Rank the
flames by temperature, from ho*est (top) to coolest (bo*om). Note: Radia on intensity is on
the y-axis.
Z
Y
X
Match the terms related to light to their defini ons.
- Reflec on----Happens when light bounces off a smooth surface
- Opaque ----- An object that reflects and/or absorbs all the light that hits it
- Diffuse reflec on ---- The result of light hi=ng a rough surface
- Transparent ----- An object that transmits light
and answers New edi on
A scien st might model light as electromagne c waves to understand how an incandescent
lightbulb works. She might model light as rays to Blank__________.
- design the op cs of a microscope
- understand the reflec on from a glass window
An object that produces light is said to be ____________.
Blank 1: luminous
Filament lightbulbs, the wires in a toaster, and a fire are all examples of ___________ light
sources, which produce light over a wide range of wavelengths.
Blank 1: incandescent
In the produc on of light by an incandescent source, internal heat moves par cles that make up
the glowing object. The moving nuclei and electrons Blank______.
disturb the electric and magne c fields in the material, crea ng electromagne c radia on
Reason:
Accelera ng charged par cles create electromagne c waves. The ho*er the object, the more
accelera on occurs, and the more light is produced.
Visible light is only a small part of the en re ___________ spectrum, which is shown in the
figure.
Blank 1: electromagne c
Match the model of light to what it can be used for.
- Electromagne c wave model --- Explain the genera on of light at a source.
- Represen ng light as a ray ---- Predict the angle of a reflec on off a mirror.
- Par cle model ---- Explain light as individual packets of energy.
Objects that are luminous ___________.
produce light
,Rank the different types of electromagne c radia on by their frequency, with the lowest
frequency on the top.
1. Radio Waves
2. Infrared Light
3. Visible Light
4. Ultraviolet Light
5. X Rays
6. Gamma Rays
Select all the choices that are incandescent light sources.
- The Sun
- A candle
An animal or plant that is bioluminous can produce visible ____________.
Blank 1: light
The light produced by incandescent light sources is generated by _____________.
accelera ng electric charges
True or false: All objects with heat produce blackbody radia on.
True
Reason:
For objects at "room temperature," this radia on is mainly in infrared wavelengths, so they do
not appear to be glowing unless you use special cameras.
The figure shows the Blank______.
electromagne c spectrum
Select all that occur as the temperature of an object emi=ng blackbody radia on increases.
- More light is produced.
- The peak of the emission shi>s to bluer (shorter) wavelengths.
A scien st might model light as electromagne c waves to understand how an incandescent
lightbulb works. She might model light as rays to Blank______.
- understand the reflec on from a glass window
- design the op cs of a microscope
, The temperature needed for an object to glow red is Blank__________ the temperature needed
for an object to glow white.
lower than
Match the type of electromagne c radia on with its frequency and common use(s).
- Microwaves ---- Lowest frequency; cellular phones, broadcast television, cooking
- Infrared light ---- Second lowest frequency; remote controls, night-vision equipment
- X rays ---- Second highest frequency; dental and medical imaging
- Gamma rays ---- Highest frequency; medical treatments
Plants and animals that emit visible light are said to be Blank______.
bioluminous
Sunlight is primarily made up of Blank______
infrared radia on
Incandescent light sources produce _____________ radia on, which is shown in the graph.
Blank 1: blackbody
If you were designing a microscope or telescope, the _______________ _____________model
would be helpful for tracing light's path through the device.
Blank 1: light
Blank 2: ray
The graph shows the blackbody emission from three flames that are the same size. Rank the
flames by temperature, from ho*est (top) to coolest (bo*om). Note: Radia on intensity is on
the y-axis.
Z
Y
X
Match the terms related to light to their defini ons.
- Reflec on----Happens when light bounces off a smooth surface
- Opaque ----- An object that reflects and/or absorbs all the light that hits it
- Diffuse reflec on ---- The result of light hi=ng a rough surface
- Transparent ----- An object that transmits light
