For this lab we measured the correlation or affect that the distance a light source has on the received power and also what affect different color filters have on the amount of received power. To test this, I used a photovoltaic cell (the receiver ) and a flashlight ( source ) to test this.
For various distances in pure light, here are the results I observed.
| Distance from source | Output Voltage |
| no light | 0.38 |
| 0 cm | 0.573 |
| 6 cm | 0.54 |
| 12 cm | 0.522 |
| 18 cm | 0.511 |
| 24 cm | 0.047 |
For various light filters, we used red, blue green and yellow set directly in front of the flashlight, these were my results.
| Color | Output Voltage |
| Red | 0.58 |
| Yellow | 0.57 |
| Blue | 0.53 |
| Green | 0.52 |
All in all, I saw that as I would expect as the distance increases the power of the light received decreases.
And with the various colors, the closer the light source came towards the infrared spectrum, the more energy we observe as voltage from the photovoltaic cell.