Read section 3.1-3.2 in your book - Properties of light and the electromagnetic spectrum. Do you have any questions
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Question 3
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What are some things people are talking about when the talk about non-visible electromagnetic waves?
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Define white light
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Read 3.3-3.5 in your book. Any questions?
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Question 26
26.
Give a definition for the term blackbody
Question 27
27.
In visible light, changing the wavelength will change the
intensity
wave speed
color
distance it will travel
Waves carry _________ from one place to another
materials
energy
medium
frequency
Increasing the amplitude of the light changes the light from
bright to dim
towards the blues and purples
to the reds and oranges
dim to bright
The amplitude of a wave tells you how
fast the wave is traveling
the space between wave crests
how many waves per second pass by
much energy is traveling through the wave
Which of the following is not a mechanical wave?
sound wave
electromagnetic wave
ocean wave
slinky wave
What does it mean that a gas stove produces mostly blue light
As a gas it does not follow Weins law
It is not a blackbody
It only emits light from specific areas of the spectrum
All of the above
When a blackbody is heated and the light it emits is split, you will see a
continuous spectra
absorbtion spectra
emissions spectra
dark line spectra
True or false: Electrons can absorb any amount of energy from visible light
True
False
true or false: The closer an electron is to the nucleus, the less energy that electron has
True
False
Suns create what kind of spectra
continuous
emissions
absorbtion
continuous spectra Light moving through a dark cloud of gas will create what kind of spectra
continuous
emissions
absorption
A hot cloud of gas that does not qualify as a blackbody will emit what kind of spectra?
continuous
emissions
absorption
If the explanations in the book seem a little too dense, these two videos may help.
why aren't there green or purple stars
and How do we know what stars are made of
Those helped a lot
thanks? maybe?
Those made everything worse.
A mechanical wave requires a medium. For an ocean wave this medium would be
the crests of the waves
the water
the ocean floor
the wind
The medium for a sound wave would be
wind
energy
air
pressure
All mechanical waves have amplitude, wavelength, period, and wave speed. Look in the area between the arrow to the word elevation and the aline showing amplitude. How many cycles of the wave is show here?
1
1.25
1.5
2
2.5
c=2.99792458 x 10^8 m/s This is specifically
the average speed of light through a vacuum
the average speed of light through air
the average speed of light through water
the instantaneous speed of light no matter what the medium
Frequency is the number of full cycles (crest to crest) a wave passes in a second. The unit, a hz, can be converted to what SI unit?
1/second
cycle/second
meter/second
cycle*second
Of the following, which carries the most energy?
Visible light
radio waves
x rays
microwaves
you were given two equations ---> E = hc/ʎ and c= ʎv
In both these equations ʎ stands for
wavelength
frequency
speed
energy
Planck's constant
because c is constant for the speed of light, wavelength and frequency are considered
proportional
inversely proportional
related by inverse square law
proportional to the square
What is the difference between a mechanical wave and electromagnetic wave?
what moves when an electromagnetic wave passes?
What does the Amplitude of the EM wave mean for the light
What does the frequency of the EM wave mean for the light
What does it mean for something to absorb light
what does it mean for an atom to emit light?
what is the relationship between frequency, wavelength, and wave speed?