The class on Wednesday began with a little speech by Mr. Wirth on how we should not be second semester seniors and try to do out best in school (or in Katie’s case "second semester junior")
Then we moved onto the wave concepts that we have covered and that will be on the quiz this Friday:
- Waves transfer energy without transferring mass
- Mechanical vs. non-mechanical
- Electromagnetic waves are non-mechanical, everything else is mechanical
-Remember that "cell phones do blow up in microwaves"
- Transverse vs. longitudinal
- Phase
- Interference
- Constructive interference
- Maximum for zero degree phase difference which is the same as a 360 degree phase difference
- Destructive interference
- Maximum of 180 degree phase difference
- Pulse vs. periodic wave
- Amplitude is related to energy
- Period
-Frequency
- Wavelength
- Speed dependent on the medium
- Frequency dependent on the source
- Diffraction
- Standing waves
- Resonance
- Doppler Effect
NEW MATERIAL:
Next we learned new material. However, this material will not be on the quiz this Friday only the information listed above
Light:
- Lights is a transverse wave consisting of energy in the form of electric and magnetic fields
- These electric and magnetic fields vibrate and right angles to the direction of movement of the wave, and at right angles to each other
- Light is also referred to as electromagnetic radiation
- Light that humans can sense is called visible light
Light Video:
- Thomas Young proved that light is a wave because of wave interference
Speed of Light:
- Symbol: c
- All mathematical information needed for speed is located on the reference table
Light Video:
- Light has many different "flavors" identified by wavelength
- All wavelengths make up a spectrum
- Visible light is 700 to 400 nm
- Gamma rays:
-Most energy
- Smallest wavelength
- High frequency
- Ultraviolet rays:
- Cause sunburn
-Wear Sunscreen
- Light is sometimes called radiation
Electromagnetic Spectrum:
- Visible light is red to violet
- Red light has long wavelengths and low frequency
- Ex. radio waves
- Violet light has short wavelengths and high frequency
- Ex. gamma rays
QUIZ ON FRIDAY!!
- know two equations
v= (f) (lambda)
t= 1/f
First period physics enjoys listening to Hannah Montana
Breakfast Club Countdown: TOMORROW!!!
5 comments:
The title of this post was supposed to be February 6, 2008 not 2 incase there is any confusion
this was really helpful! I especially like the pictures and color usage... that helps a lot.
nice job maribeth. I thought this was well done. the color coordination was cool too.
Maribeth - Excellent post! Keep up the great work.
Also, note that you can edit your post to fix the date.
Thanks for reminding everyone about the "2nd semester senioritis" that's going around!!
thx and good good with that infomation. and some good humor added.
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