Blog Post 7: Diffraction Experiment with Simulation

1. What is the 4 patterns printed on the slides? Somehow draw and post this pattern on your blog, and explain how you arrived at this pattern.

Our Distance from the light source (laser) to the wall is 1m

The first two squares showed dots in a horizontal pattern

The first one has a diffraction grating similar to this

Green dots are 1cm apart

Red dots are 1cm apart

While the second is similar to this
each green dot being 1.25cm apart
each red dot is 1.5cm

The third and fourth squares showed dots in a horizontal line

The first one the green dots were 1 cm apart
the red dots are 1cm apart

the square has a grated pattern like this

The second grated square showed green dots 1.25cm apart
and red dots 1.5cm apart

With a grated pattern like this

2. Determine the distance between the line patterns, and how think the lines may be.

160nm and thickness of the lines is 60nm (roughly)

3. Setup the light wave simulator to simulate the patterns on the 35 mm slides. Grab a picture of these simulations and post them for each of your patterns.

Blog Post 6: Good Nano Websites

http://www.zyvex.com/nano/
http://www.nano.gov/
http://spectrum.ieee.org/computing/hardware/nanotechnology-what-will-it-mean
http://www.merkle.com/papers/FAZ000911.html
http://www.zyvex.com/nanotech/MITtecRvwSmlWrld/article.html
http://www.zyvex.com/nanotech/nanotechAndMedicine.html
http://www.zyvex.com/nanotech/bearingProof.html
http://www.nanotech-now.com/
http://www.foresight.org/nano/
http://www.fda.gov/ScienceResearch/SpecialTopics/Nanotechnology/default.htm

Blog Post 5: Wave Interference Simulation Activities

1. Measure the wavelength of two drops of different amplitude, leave frequency constant.

Amplitude maxed out with a medium-low frequency: 2.96cm
Amplitude minimized with a medium-low frequency: 2.96cm

2. Measure the wavelength of two drops with different frequency, leave amplitude constant.

Amplitude medium, frequency very low: 8.98cm

Amplitude medium, frequency high: .92cm

3. Explain your results.

We can conclude that wavelength is directly proportional to frequency, Wavelength = speed/frequency. Amplitude is not in this equation thus the amplitude plays no part in the wavelength.

4. Introduce a second faucet for the next set of questions.

- measure the wavelength of the two drips, in cm

The drops wavelengths are 2.56cm

Points A, B, C, D, E, F

- then measure distances from each drip to the 6 constructive interference points and report these values, cm
Faucet - A: 2.49 cm      Faucet2 - A:2.49cm
Faucet - B: 2.11cm       Faucet2 - B: 4.55cm
Faucet - C: 4.55cm       Faucet2 - C: 2.11cm
Faucet - D: 4.55cm       Faucet2 - D: 4.55cm
Faucet - E: 4.6cm         Faucet2 - E: 6.5cm
Faucet - F: 6.5cm         Faucet2 - F: 4.6cm

A-B:1.93 cm
A-C:1.93 cm
B-E:2.49 cm
C-F:2.49 cm
B-C:3.04 cm

E-F:4.72cm

- explain the observation you have on the distance comparisons to the constructive interference points to the wavelength of the water wave.

The distance between the waves increases as they move farther away from the source, this is because they are waves that disperse out from a center circular point instead of moving from one location like a direct beam of light. Distances between constructs seem to be growing at a rate of 1.5 per added water drop.

Blogpost 4: Wave Interference

Played with the simulator on

http://phet.colorado.edu/en/simulation/wave-interference

Learned some cool things bout sound, light, and water waves!