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. Accessed on April 15, 2016.

Present the results of your experiment to your classmates, with the help of your physics teacher. Discuss:



3. What is the principle behind the concept of a pinhole camera?

4. Why is the image produced by this camera upside down?
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CROSSING BOUNDARIES

Experiments related to image production and common phenomena studied in Physics

Look at the following projects. Choose one of them for an experiment. Ask your physics teacher to help you.



Project 1: Making your photos move

Discover how you can make your photos move by trying this exciting experiment.

• Set up your digital camera on a tripod or in a secure spot near a busy street corner. If you don’t have access to a street corner, choose a fixed subject matter in a changing environment, such as a tree that catches morning and afternoon sun, or a flower that closes its petals at night.

• Remove any obstacles in front of your subject matter. Don’t move your camera once the project has started.

• Keep the flash turned off for day pictures, and turn your night mode on for pictures taken between twilight and dawn.

• Set a watch to go off every hour to remind you to take a photo of your subject matter. In 24 hours, you should have 24 images in succession.

• Upload the images into a slide show format on your computer and put it on a loop. Extend the amount of pictures in your experiment to see changes over days, weeks, or even months.

Adapted from . Accessed on April 15, 2016.



Multiples/Alamy/Glow Images

Wiltshire, United Kingdom, 2008.

Project 2: Create lightening

Lightening is a beautiful and frightening natural element. You can hear its boom from miles and miles away and see it light up a completely dark sky – if only for a moment. Did you know that you can create your own lightening using things that you are likely to find in your home or at the grocery store? You will be able to see and possibly hear the lightening as it’s created!

Here’s how you can make your very own lightening! You will need the following:

• a foil pie plate

• a pen (ball point)

• a tack


• a sock (must be wool)

Styrofoam block

• glue (if necessary)

• a cell phone with camera, if you have one



notebook paper or journal

CG Mattos/Shutterstock.com/ID/BR

Rio de Janeiro, Brazil (undated photo).
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This is the procedure for your experiment:

• Gather your materials on a table.

• Begin by placing your tack in the pie plate from the bottom up. The sharp point should be sticking out of the top of the pie plate.

• Place the pen in the pie plate, using the tack to anchor it. You may need to use a drop or two of glue to get the pen anchored well. If you use glue, let it dry before proceeding. After this, don’t touch the pie plate with your hands! You will not be able to conduct the experiment if you do.

• Take the sock and rub the block of Styrofoam quickly. This will create the negative charge you need to produce the lightening spark.

• Pick up the pie plate by holding on to the pen and push it down on top of the Styrofoam block so the tack is lodged into the Styrofoam and anchors it in place.

• Turn off the lights. If it is possible, you can film the lightening spark.

• Bring your hand towards the pie plate slowly, without touching it. This will complete the experiment.



Observation

Record each step of the experiment in your journal or on a piece of notebook paper. Be sure to describe everything in detail if you don’t have a video camera to record the experiment.



Result

When you bring your hand close to the pie plate, an electric spark will be created. You will see and hear it and possibly even feel it! What you have created is tiny lightening!

Adapted from




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