Today we did many things involving light, sound, and SOAP BUBBLES. There
were only three of us in the group, including someone who normally goes
with the Marine Sciences group. This was because today was a "snow date"
and many people had conflicts with other activities.
DIFFRACTION
Using lasers and wine glasses we learned about diffraction. When we shined
a laser through the water, it came together into one point. We also
discovered that when you shined a laser through a thin vertical space, the
light expanded through it and looked like a thin horizontal line.
SOUND
We were able to answer the question "Why can you hear me through a wall,
but not see me through a wall?" This is because sound waves are much
longer in length than light waves are. (They can amount to 1 meter)
Therefore they can bend around walls. We also looked at the freaquencies
of our voices, a turning fork, and wine glasses. (Wine glasses with
water- then running your finger around the rim.) We watched as the
overtones of a note settled down on the "osciloscope". - The sine curves
went from rocky to smooth.
BUBBLES
After making a bubble we could stick a pen through the bubble without the
bubble breaking.
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