Error that contributes to uncertainties

Three main errors:

1. Sensitivity of microphone

2. Noises from speaker

3. Resistance of circuit

There are some errors that contribute to the uncertainty, for example, the microphone is not sensitive enough, so we need to speak louder and cover the microphone with hands in order for the microphone to detect the signals. To improve this, we can use a better microphone.

Also, the sound from the speaker is not really clear and has noises. This is because not just laser light, but many other light sources from the environment reach the solar panel, which contributes to the noises. To improve this, we can use filter to cancel out the noise.

In addition, there is extra resistance throughout the entire circuit. To improve this part, we can use less wire. Also, we can take the resistance of the circuit into account when we do the calculations to obtain a more accurate result.