Wednesday, May 23
All Sections: Read page 404 (starting with effects of refraction) to page 409 and answer section review questions 1-4 on page 409.
Tuesday, May 22
Section 1: Using the Bending Light PhET sim, switch to the tab on the top of the PhET sim titled “Prism Break.” Then answer the following questions:
1) Are the reflection and refraction of light color-dependent? How can you tell?
2) Which shapes split the white light into different colors the best? Is there a particular set-up that you found demonstrates this well?
3) Given that white light can be split, try to make a situation where light forms a rainbow. What shape did you use to do this? Can you make a double rainbow in any way?
Sections 2 & 3: Complete assignment posted for section 1 yesterday.
1) Are the reflection and refraction of light color-dependent? How can you tell?
2) Which shapes split the white light into different colors the best? Is there a particular set-up that you found demonstrates this well?
3) Given that white light can be split, try to make a situation where light forms a rainbow. What shape did you use to do this? Can you make a double rainbow in any way?
Sections 2 & 3: Complete assignment posted for section 1 yesterday.
Monday, May 21
Section 1: Go to http://phet.colorado.edu/en/simulation/bending-light
The applet allows you to change the position of a laser, and also change both media. You can drag a protractor onto the screen to measure the angles of incidence and refraction.
You have two assignments:
1) Devise a procedure to calculate the index of refraction for Materials "Mystery A" and "Mystery B," and then carry it out. Tell me what you did, write down the angles you measured, and show your calculations.
2) Make the first medium water and the second air. Continue to increase the incident angle. At some point, light will stop refracting. The greatest incident angle for which refraction will occur called the critical angle. Find the critical angle for light as it goes from water to air.
Section 2: Read pages 403-404 (Total Internal Reflection) in your textbook. Also, read the 'How It Works' section on page 405 and answer the two Thinking Critically questions at the bottom of the page.
Finally, check your email later for the six flags assignment. I will be in by 4th period, so if you want, you may stop by later in the day to pick up a hard copy of the assignment from me.
The applet allows you to change the position of a laser, and also change both media. You can drag a protractor onto the screen to measure the angles of incidence and refraction.
You have two assignments:
1) Devise a procedure to calculate the index of refraction for Materials "Mystery A" and "Mystery B," and then carry it out. Tell me what you did, write down the angles you measured, and show your calculations.
2) Make the first medium water and the second air. Continue to increase the incident angle. At some point, light will stop refracting. The greatest incident angle for which refraction will occur called the critical angle. Find the critical angle for light as it goes from water to air.
Section 2: Read pages 403-404 (Total Internal Reflection) in your textbook. Also, read the 'How It Works' section on page 405 and answer the two Thinking Critically questions at the bottom of the page.
Finally, check your email later for the six flags assignment. I will be in by 4th period, so if you want, you may stop by later in the day to pick up a hard copy of the assignment from me.
Friday, May 18
Sections 1 & 3: Read pages 403-404 (Total Internal Reflection) in your textbook. Also, read the 'How It Works' section on page 405 and answer the two Thinking Critically questions at the bottom of the page.
Tuesday, May 15
Section 1 & 2: Answer the following questions in your notebook. You can find the length of the column-wavelength relationship for open pipe resonance on page 360 of your textbook.
1) A super physics student is playing his open-end pipe. The frequency of the second harmonic is 880 Hz (a pitch of A5). The speed of sound through the pipe is 350 m/sec. Find the frequency of the first harmonic and the length of the pipe.
2) On a cold frigid day, Matthew blows on a toy flute, causing resonating waves in an open-end air column. The speed of sound through the air column is 336 m/sec. The length of the air column is 30.0 cm. Calculate the frequency of the first, second, and third harmonics.
3) A flute is played with a first harmonic of 196 Hz (a pitch of G3). The length of the air column is 89.2 cm (quite a long flute). Find the speed of the wave resonating in the flute.
Section 3: Answer the following questions in your notebook:
1) Titan Tommy and the Test Tubes at a night club this weekend. The lead instrumentalist uses a test tube (closed-end air column) with a 20.2 cm air column. The speed of sound in the test tube is 340 m/sec. Find the frequency of the first harmonic played by this instrument.
1) A super physics student is playing his open-end pipe. The frequency of the second harmonic is 880 Hz (a pitch of A5). The speed of sound through the pipe is 350 m/sec. Find the frequency of the first harmonic and the length of the pipe.
2) On a cold frigid day, Matthew blows on a toy flute, causing resonating waves in an open-end air column. The speed of sound through the air column is 336 m/sec. The length of the air column is 30.0 cm. Calculate the frequency of the first, second, and third harmonics.
3) A flute is played with a first harmonic of 196 Hz (a pitch of G3). The length of the air column is 89.2 cm (quite a long flute). Find the speed of the wave resonating in the flute.
Section 3: Answer the following questions in your notebook:
1) Titan Tommy and the Test Tubes at a night club this weekend. The lead instrumentalist uses a test tube (closed-end air column) with a 20.2 cm air column. The speed of sound in the test tube is 340 m/sec. Find the frequency of the first harmonic played by this instrument.
2) Carla takes a 22.0-cm length of rigid, plastic tubing and places it into a glass of water so that one end of the tube is submerged 3.0-cm. She gently blows across the opposite end of the tube. What frequency sound waves will the tube produce? (The speed of sound at room temperature is 343 m/s)
3) On a cold frigid day, Matthew blows on a toy flute, causing resonating waves in an open-end air column. The speed of sound through the air column is 336 m/sec. The length of the air column is 30.0 cm. Calculate the frequency of the first, second, and third harmonics.
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