7Activity .2.3
MULTIPLE REFLECTION OF LIGHT
You will need
Protractor Two identical, small plane mirror Modelling clay Small object Strip of paper Pen Plastic packing tape
Procedure
1. Tape your mirrors together so that they can be opened and closed like a hinge. You want to leave a slight gap between the two edges (around 1/16th of an inch) to do this.
1. Mark angles of 30, 36, 45, 60, 90, 120 and 180 degrees on a piece of paper using your protractor.
2. Place the hinge of your mirrors at the vertex of your marked angles.
3. The first angle you will test will be 180 degrees.
4. Place your object (you can embed it in modeling clay if it won't stand up on its own) in the middle of the mirrors and look at the reflection. How many objects do you see, including both reflected and real?
5. Keeping the object equally between the two mirrors, move the mirrors together into the other angles you marked out with your protractor. How many objects do you see at each angle? Is there something about the angle can help you predict how many objects you will see? Is every reflected image the same brightness?
6. Write a word on a piece of paper, and place it in between the mirrors at 60 degrees. Look closely at the second reflection (the reflection of the reflection). Can you read the text? Why do you think this is happening?
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Answer:
4) 4
5) Not all are same brightness
Explanation:
sana tama..hehe