Variation of light intensity with
distance away from a point source of light
Aim - To investigate the
relationship between the light intensity with the distance away from a point source of
light.
Instructions
The light detector is connected to the light intensity meter and is placed
50 cm from the light source.
Take a reading of the light intensity when the light detector is at a distance of 50 cm.
Use the mouse to click and drag the light detector to a new position closer to the lamp.
The light detector remains in the position when the mouse is released.
Take a reading of the light intensity when the light detector is at this distance.
Repeat these measurements for different distances between the detector and lamp.
Plot a graph of light intensity against distance from the lamp.
Plot a second graph of intensity against 1/(distance)2 to find the
relationship between light intensity and distance from the lamp.