Description: The radiant energy of a candle is focused into a beam and is detected by a radiometer.
Instructions: Set the candle ~6.5 inches from its reflector, and the radiometer ~6 inches. Set the reflectors ~25 inches apart, from pole to pole. Take a paper or piece of cardboard and block off the radiometer reflector. While there the radiometer shouldn't spin, moving it out of the way should allow the light to focus on the radiometer, and cause it to move.
Items Used:
Notes: Focal length of the Leybold reflectors is 6 1/2". Close all doors to eliminate drafts. Math Description: None.
Size: Condition: Good. Hazard: Fire hazard from candle.
