Integrated Coordinated Science for the 21st Century
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Answers
For You To Do
- Support the glass rod in same way, as in Activity 5
- Pull the mylar tight to make a smooth curved surface.
- Student activity.
- It may be easier to pull the paper sideways to move the mirror instead of the light source.
- a) After reflecting from the convex mirror, the parallel beams spread apart. b) See the drawing on page 224.
- a) The rays may not meet at the same place, but the students should get the idea.
- a) After reflecting from the concave mirror, the parallel beams come together.
b) See the drawing on page 225.
c) If the students used the same form for both the convex and concave mirror the focal lengths should be approximately the same.
d) A convex mirror spreads out a light beam. A concave mirror brings a light beam to a focus.
- a) Students may need help in finding the image.
- a) Students may need help in finding the image.
- a) See Sample Data.
b) See Sample Data.
c) See graph in the margin of page 227.
d) As the object distance decreases, the image distance increases (and vice versa).
- The sums should be equal to within 10% to 15%.
- a) The students should see a reduced image in the convex mirror at any distance. If the object is very close, the image looks similar to the image in the plane mirror.
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