Question 1

FM radio only operates in the frequency range 88 MHz to 108 MHz because

Accepted Answer

A)  higher or lower frequencies are blocked by the ionosphere. 
B)  higher and lower frequencies are not radio waves. 
C)  the government set those limits. 
D)  none of the above 
A)  higher or lower frequencies are blocked by the ionosphere. 
B)  higher and lower frequencies are not radio waves. 
C)  the government set those limits. 
D)  none of the above

Question 2

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.
A body in a room at 300 K is heated to 3,000 K. The wavelength of the most intense EM radiation emitted by the body at 3,000 K is the wavelength of the most intense EM radiation at 300 K.

Accepted Answer

A)  0.0001 times 
B)  0.1 times 
C)  the same as 
D)  10 times 
E)  10,000 times 
A)  0.0001 times 
B)  0.1 times 
C)  the same as 
D)  10 times 
E)  10,000 times

Question 3

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. 
The peak of a body's blackbody radiation curve shifts toward longer wavelength as the temperature of the body increases.

Accepted Answer

A) True 
 B)False

FM radio only operates in the frequency range 88 MHz to 108 MHz because

The Study of Motion

Newton S 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

FM radio only operates in the frequency range 88 MHz to 108 MHz because

The Study of Motion

Newton S 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