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