Refraction of Water Optics Lab

Here is the link to the optics lab.  Please read the entire lab first and then ask questions before beginning.

Numbered Heads Review Waves and Good Vibrations

Numbered Heads Instructions

1. Form into the designated groups

2. Take out one full sheet of paper per group and list the name of the group at the top. Then list the names of the group members and place numbers next to each name (1, 2, 3…..If four members then write 4 also). It doesn’t matter who gets what number.

3. Hand the paper to the instructor. It will be used for assessment and graded.

4. Begin reviewing/ learning the listed concepts. Make up sample questions related to the concept. Try and figure out what question the teacher will ask. Time is limited; so don’t waste it!

5. Once you understand the concepts make sure each group members also understand by assessing them. Do not ask yes or no assessment questions.

Good Assessment. “Sam, could you show me how to do number three on the list?”

Poor Assessment. “Do you guys all know it?”

6. When the instructor calls a number randomly (ex. = 3) the three will go to a designated area alone and respond to a similar question. Make sure they have something to write with and a calculator. After they leave begin studying the next set of concepts for the next round.

7. After a short amount of time the person will then return to the group and their answer will be graded by the teacher and given to the entire group as a communal score.

8. The returning group member may be called again so they should receive extra instruction to help get caught up.

9. The scores are added at the end to determine winners. The top three groups receive extra points on the test.

Waves and Vibrations Concepts

1.  Definition of Simple harmonic Motion and Energy conversion in SHM

2.  What happens to acceleration  in  SHM (Simple Harmonic Motion) when displacement is increased or decreased by a factor ?

3.  In a mass spring system or pendulum at maximum displacement things that are true.

4.  In a mass spring system or pendulum at minimum  displacement things that are true.

5.  amplitude calculation in a pendulum given total angle of swing

6.  relationship between frequency and period .

7.  relationship between frequency and cycles per second or hertz?

8.  What happens to the period in a pendulum if the frequency changes from 30 hz to 90 hz?

9.  What happens to the period in a pendulum if the length changes from 10 m to 90 m?

10.  By what factor should the length of a pendulum change in order to have 5 X the period?

11.  By what factor should the length of a pendulum change in order to have 5 X the frequency?

12.  What changes if the pendulum's length is changed?

13.  Calculate the "a" due to gravity using a pendulum.   You also have to know by what factor it would change.  Ex if period is 2X normal this would happen if gravity were 1/4 of normal.   Know your formulas.

14.  Calculate a spring constant

15.  Calculate period given frequency

16.  Calculate period of a pendulum

17.  Calculate frequency of a wave  given wavelength and speed.

18  Calculate period of a wave given wavelength and speed

19.  Be able to explain in depth how thin film coloration works.  Ex how you would see cyan (Blue green)  in a particular spot on a CD.The explanation must reference destructive interference and film thickness as  a multiple of wavelength.