PSC 1121 - Chapter 7 Newest 2025/2026
Complete Questions and Correct Detailed
Answers Already Graded A+|Brand New
Version
A scientist might model light as electromagnetic waves to understand how an
incandescent lightbulb works. She might model light as rays to Blank__________.
- CORRECT ANSWER-- design the optics of a microscope
- understand the reflection from a glass window
Sunlight is primarily made up of Blank______ - CORRECT ANSWER-infrared
radiation
Incandescent light sources produce _____________ radiation, which is shown in
the graph. - CORRECT ANSWER-Blank 1: blackbody
If you were designing a microscope or telescope, the _______________
_____________model would be helpful for tracing light's path through the
device. - CORRECT ANSWER-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 hottest (top) to coolest (bottom).
Note: Radiation intensity is on the y-axis. - CORRECT ANSWER-Z
Y
X
Match the terms related to light to their definitions. - CORRECT ANSWER--
Reflection----Happens when light bounces off a smooth surface
- Opaque ----- An object that reflects and/or absorbs all the light that hits it
- Diffuse reflection ---- The result of light hitting a rough surface
- Transparent ----- An object that transmits light
An object that produces light is said to be ____________. - CORRECT ANSWER-
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. - CORRECT ANSWER-Blank 1: incandescent
,In the production of light by an incandescent source, internal heat moves particles
that make up the glowing object. The moving nuclei and electrons Blank______. -
CORRECT ANSWER-disturb the electric and magnetic fields in the material,
creating electromagnetic radiation
Reason:
Accelerating charged particles create electromagnetic waves. The hotter the
object, the more acceleration occurs, and the more light is produced.
Visible light is only a small part of the entire ___________ spectrum, which is
shown in the figure. - CORRECT ANSWER-Blank 1: electromagnetic
Match the model of light to what it can be used for. - CORRECT ANSWER--
Electromagnetic wave model --- Explain the generation of light at a source.
- Representing light as a ray ---- Predict the angle of a reflection off a mirror.
- Particle model ---- Explain light as individual packets of energy.
Objects that are luminous ___________. - CORRECT ANSWER-produce light
Rank the different types of electromagnetic radiation by their frequency, with the
lowest frequency on the top. - CORRECT ANSWER-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. - CORRECT ANSWER-
- The Sun
- A candle
An animal or plant that is bioluminous can produce visible ____________. -
CORRECT ANSWER-Blank 1: light
The light produced by incandescent light sources is generated by _____________.
- CORRECT ANSWER-accelerating electric charges
True or false: All objects with heat produce blackbody radiation. - CORRECT
ANSWER-True
Reason:
Complete Questions and Correct Detailed
Answers Already Graded A+|Brand New
Version
A scientist might model light as electromagnetic waves to understand how an
incandescent lightbulb works. She might model light as rays to Blank__________.
- CORRECT ANSWER-- design the optics of a microscope
- understand the reflection from a glass window
Sunlight is primarily made up of Blank______ - CORRECT ANSWER-infrared
radiation
Incandescent light sources produce _____________ radiation, which is shown in
the graph. - CORRECT ANSWER-Blank 1: blackbody
If you were designing a microscope or telescope, the _______________
_____________model would be helpful for tracing light's path through the
device. - CORRECT ANSWER-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 hottest (top) to coolest (bottom).
Note: Radiation intensity is on the y-axis. - CORRECT ANSWER-Z
Y
X
Match the terms related to light to their definitions. - CORRECT ANSWER--
Reflection----Happens when light bounces off a smooth surface
- Opaque ----- An object that reflects and/or absorbs all the light that hits it
- Diffuse reflection ---- The result of light hitting a rough surface
- Transparent ----- An object that transmits light
An object that produces light is said to be ____________. - CORRECT ANSWER-
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. - CORRECT ANSWER-Blank 1: incandescent
,In the production of light by an incandescent source, internal heat moves particles
that make up the glowing object. The moving nuclei and electrons Blank______. -
CORRECT ANSWER-disturb the electric and magnetic fields in the material,
creating electromagnetic radiation
Reason:
Accelerating charged particles create electromagnetic waves. The hotter the
object, the more acceleration occurs, and the more light is produced.
Visible light is only a small part of the entire ___________ spectrum, which is
shown in the figure. - CORRECT ANSWER-Blank 1: electromagnetic
Match the model of light to what it can be used for. - CORRECT ANSWER--
Electromagnetic wave model --- Explain the generation of light at a source.
- Representing light as a ray ---- Predict the angle of a reflection off a mirror.
- Particle model ---- Explain light as individual packets of energy.
Objects that are luminous ___________. - CORRECT ANSWER-produce light
Rank the different types of electromagnetic radiation by their frequency, with the
lowest frequency on the top. - CORRECT ANSWER-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. - CORRECT ANSWER-
- The Sun
- A candle
An animal or plant that is bioluminous can produce visible ____________. -
CORRECT ANSWER-Blank 1: light
The light produced by incandescent light sources is generated by _____________.
- CORRECT ANSWER-accelerating electric charges
True or false: All objects with heat produce blackbody radiation. - CORRECT
ANSWER-True
Reason:
