Astronomy > Stellar Astronomy
DCS# 8B10.xx
APPARENT BRIGHTNESS
APPARATUS
three 6 V batteries with potentiometers and bulbs
202-10-B
DESCRIPTION
The lamps have dimmers and are portable, so they can be placed at different locations in the darkened classroom to show that the apparent brightness of a light source depends both on its intrinsic brightness and its distance from the observer.
NOTES
Use 6-V 0.6-W flashlight bulbs.
