Materials: Pasco Light Machine and a Sheet of Graph Paper, reflective mirrors

Turn on the Light Machine. Observe the light ray.

Line up the machine, and aim a “beam” directly as shown toward the reflective surface

EXPERIMENT changing the

position (angle) of the reflective

surface. OBSERVE

Position the machine so the light beam is 10 cm from the normal line and 10 cm from the reflective surface

NORMAL LINE

10 cm

RESET the Pasco Device so that it produce 3 beams instead of one as shown.

Position the light rays so that they strike the reflective surface at a 45 degree angle.

Describe the reflective rays. At what angle to they reflect from the reflective surface?

Trace you actual setup on your graph paper. Label all parts of the diagram.

Now, aim the Pasco triple beam at a concave reflective surface?

Trace your setup on the graph paper.

Label all parts of your diagram.

Did you label the incoming ray, reflective surface, outgoing ray?

Using your protractor and your diagram, measure the angle between the incoming ray and the reflective ray?

Experiment placing the focal point of the reflection to the left, right and center or the incoming rays!

ON YOUR OWN:

Repeat these procedures, except this time use the convex reflective surface.

Trace and draw your results on graph paper.

Compare and contrast the differences (if any) between the concave and convex reflective surfaces.