Maxwell's equations describe light as a _____ _____.
Wave Phenomenon
100
What does the symbol c stand for?
The symbol c stands for the speed of light.
100
Why was the photon model developed?
The photon model was developed to account for the characteristics of waves.
100
What are the major differences between the way mechanical waves and EM waves move? (2 answers)
Mechanical waves require a medium to move and Electromagnetic waves do not require a medium to move.
200
EM energy can be described as ______.
waves
200
Why can an EM wave be transmitted without matter?
EM Waves can be transmitted without matter because the electric and magnetic fields are self-sustaining.
200
The _______ of a photon is unchanged.
frequency
200
How is EM energy like a wave?
EM energy is wavelike because it refracts and diffracts like waves.
200
What is the phenomenon called that occurs when the received frequency of the EM signal decreases as the source moves away from the observer?
This phenomenon is called the Doppler Effect.
300
(True or False) Electromagnetic energy can be mathematically described by relatively simple equations that demonstrate the wave nature of this energy.
True
300
The electric/magnetic fieldWhat are the two fields that are talked about in this chapter?
The electric/magnetic field
300
What does f stand for the in the formula c = f × λ?
f is the frequency of the wave
300
What is EM energy transported as?
Photons
300
What is light that consist of particles?
Corpuscles
400
Electromagnetic spectrum or EM SpectrumWhat is a continuum of EM waves extending from the extremely-low-frequency radio waves to the extremely-high-frequency gamma rays?
Electromagnetic spectrum or EM Spectrum
400
Why do x-ray photons have more energy?
X-ray photons have much higher frequencies.
400
(True or False)The speed of light is always the constant value c.
False
400
A photon's energy is ______ to its frequency.
proportional
400
Why is the EM spectrum a continuum?
The EM spectrum is a continuum because there are no known gaps in the spectrum.
500
James Clerk MaxwellWho showed that EM energy related electricity and magnetism as two aspects of the same phenomenon?
James Clerk Maxwell
500
(True or False)A photon is a discrete packet of EM energy.
True
500
Where has Gravitational lensing been observed?
Gravitational lensing has been observed in EM Waves
500
Gamma Photon
What type of EM photons are the most energetic?
500
Who was the German physicist who altered the course of physics with his discoveries about the nature of EM radiation?