1. What is the effect of light intensity on the LED when used in photovoltaic mode?
2. What influence does the color of the LED have on the voltage produced when used in photovoltaic mode?
3. What is the correlation between Vload and light level in Figure 5.3.1? Give at least two examples of where this effect might be put to good use.
4. Why might an infrared emitter/detector system be used in consumer electronics in place of ordinary visible light emitter/detectors?