Physical Science Journal Questions for Week 11

Questions due on Tuesday, April 13, 2004 Either e-mail or pencil/paper

1. A 100 watt lamp is wired with a dimmer switch in series with the lamp. The whole circuit is designed to operate at 120 Volts. When the resistance of the dimmer resistance equals the resistance of the lamp, calculate the total power. Hint: calculate the current with and without the dimmer.

2. What happens in the simple telescope image if a triangle aperture is placed on the main lens?

3. Light is passed through a yellow filter. The light is then analyzed as to the colors contained in the yellow light. What colors are present in the yellow light?

4. Blue light and red light are mixed. What is the resulting color?

5. What is the rule for mixing pigments? See the applet: http://webphysics.ph.msstate.edu/jc/library/30-7/index.html