Building a PinHole Camera

By tomorrow (Tuesday), you need a pinhole camera for each of you.   PT has a book that details this, or you can look on the web.  We are making a photographic paper camera.  Lucas Fangmann is in PTs room and can help if you ask nicely.  Some research can be found at these links.

http://www.kodak.com/ek/US/en/Pinhole_Camera.htm

http://www.pinholeresource.com/shop/home

http://www.f295.org/main/forum/

Young's Double Slit Experiment

Review http://www.physicsclassroom.com/class/light/U12l3b.cfm

Read http://www.physicsclassroom.com/class/light/U12l3c.cfm and do the two questions at the bottom.

Read http://www.physicsclassroom.com/class/light/U12l3d.cfm


Then, practice setting up the experiment, using the applet

Tomorrow, we will be recreating the classic experiment

Click to Run

10/2 Snell's Law

Read through
http://www.physicsclassroom.com/Class/refrn/u14l1a.cfm
http://www.physicsclassroom.com/Class/refrn/U14l1b.cfm
http://www.physicsclassroom.com/Class/refrn/U14l1c.cfm
Snell's Law Applet 1
Snell Law Lab

9/26 Problem Set Mirrors

Create a diagram for a convex mirror similar to the concave mirrors from yesterday. Conventions are found here Problem set ====================

Reflection

Plane Mirrors
http://www.phy.ntnu.edu.tw/oldjava/optics/mirror_e.html

Making an Image with Plane Mirrors

http://perg.phys.ksu.edu/vqm/laserweb/Java/MirrImge/Imageme1.htm

Concave Mirrors
http://www.phys.ufl.edu/~phy3054/light/mirror/applets/cavemir/Welcome.html

Convex Mirrors
http://www.phys.ufl.edu/~phy3054/light/mirror/applets/convmir/Welcome.html

9/18 Interference, Reflection and Refraction

Read:

http://www.physicsclassroom.com/Class/waves/u10l3c.cfm

http://www.physicsclassroom.com/Class/waves/U10L3b.cfm

Worksheet 2

(use the virtual ripple tank applet)

http://www.physicsclassroom.com/Class/waves/U10L3b.cfm

9/12 Wave set

Complete: http://www.physicsclassroom.com/reviews/waves/wavesprint.cfm

9/11 Newton's Cradle Analysis

Your Newton's Cradle should be built. Determine experimentally the period of one swing of one ball on your Newton's cradle. Use this, and the formula for a pendulum, to calculate the expected length of the pendulum. Compare this to the measured length of the string and the ball. Determine the change in x the far ball goes through if it is hit with a single ball. Do this for a ball that is lifted to h1 and h2. Use Es= 1/2k(change in x)2 to calculate the k of the ball, which is acting as a spring. Remember, in theory, Es should be equal to PE of the ball (m(ball)*accel(g)*height(above ground). Write up the results, and take a picture of your Newton's cradle. Submit both to me via email.

9/7 Modeling waves

9/4 Unit 2: Defining a Wave

Skim through Lesson 1    Most of this will be review, so move quickly, starting here


Pay careful attention to the animations.

Answer the questions in your notes.

Let me know when you get to the earthquake simulation.

http://www.flickr.com/photos/ifrc/4278689245/

Aug 29

photo credit: justshootingmemories via photo pin cc

This is a Foucault Pendulum.   It moves back and forth, but over the course of 24 hours, it will knock down all the pegs in the circle because of the earth's movement.

How would you create an energy diagram(s) for this over the course of one swing?  Over the course of 24 hours?   Do this individually, and explain your reasoning.

Do the same with this.


Assessment:  Springs and Pendulums

You will create your own Newton's Cradle.   In this case, the balls act as a type of spring, so imagine how you could use the concept of Hooke's Law to calculate a spring constant for the system.  Also, calculate the period of the pendulum of one ball.

August 27

So, on Friday, you read about the concept of work, W=F*d, where work is in JOULES (jewels), F is in Newtons, and d is in meters.

In other words, Work is another way to refer to kinetic energy when a spring is stretching.


W = F* d
KE = 1/2 mv^2

F = kx

It's the combination of these three formulas that gives us the formulas for spring constant energy.

====
Today, we're looking at the interaction between the different types of energies.  To do this, you'll be working on two worksheets.  Before you do that, we'll look at some ways to represent energy

Worksheet A

Worksheet B

Aug 24

Sorry guys, but today is a reading and processing day.  You need to start with the definition of work  and work through the four consecutive pages until you get to this page.   Take your time.  Answer the questions together, and note anything which confuses you.


If you have questions, please text me.

Aug 21

Hooke's Law Activity

http://phet.colorado.edu/en/simulation/mass-spring-lab

Read

http://www.physicsclassroom.com/class/waves/u10l0c.cfm

http://www.physicsclassroom.com/class/waves/u10l0d.cfm

Day 1and 2: Intro to Waves

Please read:

http://www.physicsclassroom.com/Class/waves/u10l0a.cfm
http://www.physicsclassroom.com/Class/waves/U10l0b.cfm

When you get done, give me a top five points for each page.  This should take 15-30 minutes.

LAB on Periodic Motion: Create a series of pendulums of different length, different masses, and make them swing at an angle of no more than 10 degrees each way. Document the period of 10 swings and 1 swing in this effort. Organize your data in a spreadsheet on Google Docs. Share the spreadsheet with one another and with me at marciapowellATw-del.... using the share feature. As you go along, write any observations that you make on a sheet of paper.

Diffraction/Interaction

CD Groove Spacing

Young's Experiment

Electromagnetic introduction

Dear Mr. Fangmann,

Our next unit is understanding the transverse properties of electromagnetic waves.   As you work through the first effort , start thinking:   what can I use electromagnetic waves for in the real world?  Brainstorm a list of applications, and we'll talk tomorrow.  Text me with questions.

Properties of Waves

Properties of Waves
  Wave Boundaries
  Standing vs. Non-Standing Waves


http://phet.colorado.edu/sims/wave-on-a-string/wave-on-a-string_en.html

waves motion of pendulums

Day 2: Masses and Springs

• Use Scatter Graphs to Define the Period of a Pendulum
• Data linearization
• The role of gravity

http://phet.colorado.edu/en/simulation/mass-spring-lab 

Design three hypotheses to use with this lab:

*friction and the effect on the spring/mass

*mass and the effect on the period or stretch

*stiffness of the spring and the effect on the period, stretch, or mass

Gather data to support or reject each of the hypotheses.

How are the ideas of a mass on a spring and a pendulum alike?  How are they different?

http://www.physicsclassroom.com/Class/waves/u10l0c.cfm  (note the pictures)

http://www.physicsclassroom.com/Class/waves/u10l0d.cfm  (directly related to the PHET)

Day 1: Intro to Waves

Please read:

http://www.physicsclassroom.com/Class/waves/u10l0a.cfm
http://www.physicsclassroom.com/Class/waves/U10l0b.cfm

When you get done, give me a top five points for each page.  This should take 15-30 minutes.

LAB on Periodic Motion