Experiment 10 Lab Report - William Seo Experiment 10:...

Info iconThis preview shows pages 1–3. Sign up to view the full content.

View Full Document Right Arrow Icon
William Seo Experiment 10: Liquid Crystals CHEM 1211k- C02 Ameneh Cheshmehkani November 15, 2011 I did not share this lab report with anyone after lab.
Background image of page 1

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon
Data/Results I. Part A 1. Hold two pieces of polarizing film up to the room lights and rotate one 90 o . Question to answer with observations: What are the films doing to the light? a. The films are diffracting the light, as do polarized sunglasses, causing us to see less light, making the polarizing film seem darker. 2. Put a tape “blank” behind the polarizing films and rotate one film back and forth. Question to answer with observations: Does the front polarizing film absorb all of the light when rotated 90 o ? Why or why not? a. Yes, because the tape blank rotates the angle of the incoming wavelength so that only some of the light passes through the back film. When the front film is rotated, the remaining light that passes through the back film is blocked by the front film. 3. Put a tape “blank” between the polarizing films and rotate one film back and forth. Question to answer with observations: Does the front polarizing film absorb all of the light when rotated 90 o ? Why or why not? a. No, because when the tape is between the films, the incoming wavelengths are rotated so that when one film is rotated 90 degrees, light will still pass through. 4. Put a tape MBBA sample in between the polarizing films and rotate one film back and forth. Question to answer with observations: Does the front polarizing film absorb all of the light when rotated 90 o ? What areas are letting the light pass through? Why is this area passing light through? a. No, the areas containing the MBBA are letting light through because although the tape itself rotates the angle of the incoming wavelengths, the MBBA also rotates the wavelength, making it as if there had been no angle rotation whatsoever. 5. Try to hold a magnet up to the sample while in between the polarizing films. Does the magnetic field affect the position of the director? a.
Background image of page 2
Image of page 3
This is the end of the preview. Sign up to access the rest of the document.

This note was uploaded on 02/26/2012 for the course CHBE 2100 taught by Professor Staff during the Spring '08 term at Georgia Institute of Technology.

Page1 / 5

Experiment 10 Lab Report - William Seo Experiment 10:...

This preview shows document pages 1 - 3. Sign up to view the full document.

View Full Document Right Arrow Icon
Ask a homework question - tutors are online