4.1 Analysis of results
In conclusion, we have found that fluorescent bulbs are the better bulbs to use. fluorescent bulbs have the lowest amount of radiation emitted but also the highest light intensity. Tungsten bulbs have the second lowest amount of UV emitted while fluorescent bulbs have the highest amount of UV emissions. Fluorescent bulbs emit a high light intensity but also have a higher UV rating, as such, the ratio was thus higher than the rest. The tungsten and LED bulbs both have a lower ratio, this may be because the LED bulbs were designed to direct light at a certain source thus making the light intensity higher while having the more UV radiation.
4.2 Key findings
In conclusion, we have found out that fluorescent bulbs have the lowest UV emissions and are the least harmful to human skin.
4.3 Explanation of key findings
The value that we got in the cupboard, a control variable was 3.00. The closest value was that of the fluorescent bulb with a value of 0.00107. This means that fluorescent bulbs are the better bulbs to use as they are close to having nothing. The second highest was that of the tungsten bulb. It had a value of 0.0217 and the fluorescent being the lowest with a value of 0.0229.
4.4 Evaluation of Hypothesis
In our hypothesis, we thought that LED bulbs had the lowest UV emissions, the results from the experiment had shown us to be wrong as the LED bulbs were the most dangerous bulbs to use. Thus we have predicted a wrong hypothesis. Our hypothesis was actually based on the fact that we use them in our daily household everyday with not too many ill effects and the fact that it is able to direct light and seemingly improve light intensity with the same average amount of UV, which was in fact wrong.
4.5 Areas for improvement
Firstly, we could have measured the amount of UV for Uv-A and UV-C to gain a more accurate insight into the emission of UV. Secondly, we had a limitation which caused us to be unable to use a location in which there is no external UV or light intensity interference, which would make the results more accurate. We also were unable to have exactly same sized bulbs with the same measurements.