Question 1

The main form of radiation that our bodies emit is __________.

Accepted Answer

The answer of The main form of radiation that our...

Question 2

The main form of radiation that our bodies emit is ultraviolet.

Accepted Answer

A) True 
 B)False

Question 3

If we see two objects that have different colors,the light waves coming from them have different ____________

Accepted Answer

frequencie

Question 4

​Match each item with the correct statement below.
-low frequency radio waves reflect off this

Accepted Answer

A) ​blackbody radiation 
B) ​carbon dioxide 
C) ​electromagnetic induction 
D) ​gamma rays 
E) ​greenhouse effect
F)​infrared
G)​ionosphere
H)​lodestone
I)​magnetic field
J)​microwaves
K)​ozone
L)​radio waves
M)​transformer
N)​ultraviolet
O)​x rays 
A) ​blackbody radiation 
B) ​carbon dioxide 
C) ​electromagnetic induction 
D) ​gamma rays 
E) ​greenhouse effect
F)​infrared
G)​ionosphere
H)​lodestone
I)​magnetic field
J)​microwaves
K)​ozone
L)​radio waves
M)​transformer
N)​ultraviolet
O)​x rays

Question 5

An object at an initial temperature of 27 oC is raised to a temperature of 877 oC.How much more energy does the object emit as blackbody radiation at the higher temperature compared to the lower temperature?

Accepted Answer

A) 32.5 
B) 215.9 
C) 864.5 
D) 1,113,123 
A) 32.5 
B) 215.9 
C) 864.5 
D) 1,113,123

Question 6

For a body emitting blackbody radiation,the total power emitted is proportional to the 4th power of the body's absolute temperature:   (T in kelvins)
and the wavelength of the emitted EM radiation that has the highest intensity is inversely proportional to the body's absolute temperature according to:   (   in meters,T in kelvins)
Assume an object is emitting blackbody radiation.
-As the temperature of a body increases,

Accepted Answer

A) the body gets brighter. 
B) the color of the body shifts from red to white. 
C) the wavelength of the most intense light decreases. 
D) the frequency of the most intense light increases. 
E) all the above. 
A) the body gets brighter. 
B) the color of the body shifts from red to white. 
C) the wavelength of the most intense light decreases. 
D) the frequency of the most intense light increases. 
E) all the above.

Question 7

Global warming

Accepted Answer

A) has not yet been observed. 
B) has been caused by increasing levels of carbon dioxide in the atmosphere. 
C) has led to a depletion of the ozone layer in the atmosphere. 
D) has no serious consequences. 
A) has not yet been observed. 
B) has been caused by increasing levels of carbon dioxide in the atmosphere. 
C) has led to a depletion of the ozone layer in the atmosphere. 
D) has no serious consequences.

Question 8

The type of EM wave used in aircraft radar is

Accepted Answer

A) radio waves. 
B) microwaves. 
C) x-rays. 
D) gamma rays. 
A) radio waves. 
B) microwaves. 
C) x-rays. 
D) gamma rays.

Question 9

The ionosphere

Accepted Answer

A) reflects all EM waves. 
B) reflects high frequency radio waves. 
C) reflects low frequency radio waves. 
D) is responsible for the greenhouse effect. 
E) absorbs ultraviolet light in sunlight. 
A) reflects all EM waves. 
B) reflects high frequency radio waves. 
C) reflects low frequency radio waves. 
D) is responsible for the greenhouse effect. 
E) absorbs ultraviolet light in sunlight.

Question 10

What's the Big Bang?

Accepted Answer

A) the creation of the universe 
B) microwave radiation from all directions in the sky 
C) the Hubble relation 
D) a punk rock band 
A) the creation of the universe 
B) microwave radiation from all directions in the sky 
C) the Hubble relation 
D) a punk rock band

Question 11

The ionosphere reflects high frequency radio waves.

Accepted Answer

A) True 
 B)False

Question 12

The greenhouse effect occurs because

Accepted Answer

A) low frequency EM waves are reflected from the atmosphere. 
B) high frequency EM waves are reflected from the atmosphere. 
C) the ozone layer absorbs ultraviolet light. 
D) carbon dioxide in the atmosphere absorbs infrared radiation. 
E) none of the above 
A) low frequency EM waves are reflected from the atmosphere. 
B) high frequency EM waves are reflected from the atmosphere. 
C) the ozone layer absorbs ultraviolet light. 
D) carbon dioxide in the atmosphere absorbs infrared radiation. 
E) none of the above

Question 13

The wavelength of a radio wave from an AM station broadcasting at 1,000 kilohertz on your radio dial is __________.

Accepted Answer

The answer of The wavelength of a radio wave from...

Question 14

The cosmic background radiation corresponds to a blackbody at a temperature of 2.726 kelvins.

Accepted Answer

A) True 
 B)False

Question 15

For a body emitting blackbody radiation,the total power emitted is proportional to the 4th power of the body's absolute temperature:   (T in kelvins)
and the wavelength of the emitted EM radiation that has the highest intensity is inversely proportional to the body's absolute temperature according to:   (   in meters,T in kelvins)
Assume an object is emitting blackbody radiation.
-If the Kelvin temperature of an object is doubled,the amount of radiant energy emitted each second is twice the original amount.

Accepted Answer

A) True 
 B)False

Question 16

Why would a decrease in the amount of ozone in the atmosphere increase the likelihood of people getting sunburn?

Accepted Answer

A) Global temperatures would rise 
B) More ultraviolet radiation would reach the ground 
C) People would be exposed to more infrared radiation 
D) The premise is incorrect.Ozone and sunburn are not related 
A) Global temperatures would rise 
B) More ultraviolet radiation would reach the ground 
C) People would be exposed to more infrared radiation 
D) The premise is incorrect.Ozone and sunburn are not related

Question 17

Blackbody radiation is emitted from a small hole in a furnace.

Accepted Answer

A) True 
 B)False

Question 18

A transformer only works with AC.

Accepted Answer

A) True 
 B)False

Question 19

The type of EM radiation that has wavelength just a bit shorter than that of visible light is

Accepted Answer

A) ultraviolet. 
B) infrared. 
C) x-ray. 
D) microwave. 
E) gamma ray. 
A) ultraviolet. 
B) infrared. 
C) x-ray. 
D) microwave. 
E) gamma ray.

Question 20

A speaker can be used as a crude microphone.

Accepted Answer

A) True 
 B)False

The main form of radiation that our bodies emit is __________.

The main form of radiation that our bodies emit is ultraviolet.

If we see two objects that have different colors,the light waves coming from them have different ____________

Match each item with the correct statement below. -low frequency radio waves reflect off this

An object at an initial temperature of 27 ^oC is raised to a temperature of 877 ^oC.How much more energy does the object emit as blackbody radiation at the higher temperature compared to the lower temperature?

Global warming

The type of EM wave used in aircraft radar is

The ionosphere

What's the Big Bang?

The ionosphere reflects high frequency radio waves.

The greenhouse effect occurs because

The wavelength of a radio wave from an AM station broadcasting at 1,000 kilohertz on your radio dial is __________.

The cosmic background radiation corresponds to a blackbody at a temperature of 2.726 kelvins.

Why would a decrease in the amount of ozone in the atmosphere increase the likelihood of people getting sunburn?

Blackbody radiation is emitted from a small hole in a furnace.

A transformer only works with AC.

The type of EM radiation that has wavelength just a bit shorter than that of visible light is

A speaker can be used as a crude microphone.

The Study of Motion

Newtons Laws

Energy and Conservation Laws

Physics of Matter

Temperature and Heat

Waves and Sound

Electricity

Optics

Atomic Physics

Nuclear Physics

Special Relativity and Elementary Particles

Filters

Exam 8: Electromagnetism and Em Waves

The main form of radiation that our bodies emit is __________.

The main form of radiation that our bodies emit is ultraviolet.

If we see two objects that have different colors,the light waves coming from them have different ____________

​Match each item with the correct statement below. -low frequency radio waves reflect off this

An object at an initial temperature of 27 oC is raised to a temperature of 877 oC.How much more energy does the object emit as blackbody radiation at the higher temperature compared to the lower temperature?

Global warming

The type of EM wave used in aircraft radar is

The ionosphere

What's the Big Bang?

The ionosphere reflects high frequency radio waves.

The greenhouse effect occurs because

The wavelength of a radio wave from an AM station broadcasting at 1,000 kilohertz on your radio dial is __________.

The cosmic background radiation corresponds to a blackbody at a temperature of 2.726 kelvins.

Why would a decrease in the amount of ozone in the atmosphere increase the likelihood of people getting sunburn?

Blackbody radiation is emitted from a small hole in a furnace.

A transformer only works with AC.

The type of EM radiation that has wavelength just a bit shorter than that of visible light is

A speaker can be used as a crude microphone.

The Study of Motion

Newtons Laws

Energy and Conservation Laws

Physics of Matter

Temperature and Heat

Waves and Sound

Electricity

Optics

Atomic Physics

Nuclear Physics

Special Relativity and Elementary Particles

Filters

Match each item with the correct statement below. -low frequency radio waves reflect off this

An object at an initial temperature of 27 ^oC is raised to a temperature of 877 ^oC.How much more energy does the object emit as blackbody radiation at the higher temperature compared to the lower temperature?