Honors Physics discussed the properties of plane and concave mirrors and the utility of the mirror formula. C Block will continue this discussion tomorrow and add convex mirrors to the mix. G Block does not meet tomorrow, so will rejoin the unit with the lab activity on mirrors scheduled for Monday.
Physics conducted the light intensity lab and, again, witnessed a very good inverse-square relationship between distance and brightness. Adding sunglasses did not alter the inverse-square relationship - it only dropped the values of the curve. Again, all sunglasses tested today demonstrated UV resistance in the presence of sunlight. A block will discuss the wavelet theory of light tomorrow and E block will have to wait until Monday for that bit of information.
Physical Science reviewed for tomorrow's exam. Tomorrow, I will collect the homework we went over, so have it ready to turn in. Some folks were having a spot of bother with harmonics; here are some links to harmonics resources:
- Strings, Standing Waves and Harmonics
- Fundamental Frequency and Harmonics
- Harmonic Series
- Standing Waves Applet - this applet shows the resultant wave pattern in a string, pipe closed on one end and pipe open at both ends. The relative intensities of each harmonic can be varied to see the effect on the resultant wave pattern.
Here is a nice series of videos detailing harmonics and harmonic series:
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