Discussion
Limitations:
Limitations are uncontrollable factors of an experiment. In the case of this experiment, the limitations would be:
- direction of the wavelengths
- size of hotspot
- location of hotspot
- contents and texture of food item
Successions and Improvements:
The following Improvements could be made:
- location of food to remain consistent when replicating experiment
- comparing food of the same density, size, height, content etc.
- having a larger sample of food for provision of more distinct hotspots
- more accurate hypothesis with scientific reasoning
Successions of the experiment were:
- identifying two 'hotspots' within each plate
- being able to measure the distance without difficulty
- converting calculations so that it was in form of metres/second
- correct use of equipment and following of method
- followed risk assessment resulting in no harm
Validity and Reliability:
When data is collected, measured or evaluated; reliability refers to the consistency of information. Reliability indicates the precision of the established results. Validity refers to whether the data you took correctly tests the aim and at the same time keeps all variables controlled apart from the one being investigated (independent variable). It indicates the accuracy of the results; which is when the measurement is or is to the accepted value. The relationship between reliability and validity can be confusing because measurements can be realiable and not valid. However, results cannot be valid unless they are reliable. In the experiment of investigating the speed of light using a microwave oven the:
Validity - In terms of success of hypothesizing the result; it was failure The difference between the hotspots in the chocolate were less representative of the speed of light in comparison to the distance between the hotspots within the marshmallows. Additionally, the accepted value of the result was a number close to 300 000 000 metres/second. None of the results were even 10 000 000 metres/second units away from the expected results.
However, the calculation given by the marshmallows was not that far off. Also, the experiment did answer the aim which was to investigate which food item was most accurate; in others words, meaning most closest to. Therefore, the aim was to find out possibly which of the three foods, not is, but is closest to the published value of the speed of life. Resultantly, it can be agreed and concluded that this experiment should receive a medium validity.
Reliability - Repetition indicates reliability. The experiment is sufficiently reliable for it had been replicated a few more times with each individual food item. The ending results of the repeated experiments with the original were quite the similar; with variations of only a maximum of 1. Moreover, measuring the nearest-to-nearest distance as well as the furthest-to-further distance between the hotspots provided further precision.
Limitations are uncontrollable factors of an experiment. In the case of this experiment, the limitations would be:
- direction of the wavelengths
- size of hotspot
- location of hotspot
- contents and texture of food item
Successions and Improvements:
The following Improvements could be made:
- location of food to remain consistent when replicating experiment
- comparing food of the same density, size, height, content etc.
- having a larger sample of food for provision of more distinct hotspots
- more accurate hypothesis with scientific reasoning
Successions of the experiment were:
- identifying two 'hotspots' within each plate
- being able to measure the distance without difficulty
- converting calculations so that it was in form of metres/second
- correct use of equipment and following of method
- followed risk assessment resulting in no harm
Validity and Reliability:
When data is collected, measured or evaluated; reliability refers to the consistency of information. Reliability indicates the precision of the established results. Validity refers to whether the data you took correctly tests the aim and at the same time keeps all variables controlled apart from the one being investigated (independent variable). It indicates the accuracy of the results; which is when the measurement is or is to the accepted value. The relationship between reliability and validity can be confusing because measurements can be realiable and not valid. However, results cannot be valid unless they are reliable. In the experiment of investigating the speed of light using a microwave oven the:
Validity - In terms of success of hypothesizing the result; it was failure The difference between the hotspots in the chocolate were less representative of the speed of light in comparison to the distance between the hotspots within the marshmallows. Additionally, the accepted value of the result was a number close to 300 000 000 metres/second. None of the results were even 10 000 000 metres/second units away from the expected results.
However, the calculation given by the marshmallows was not that far off. Also, the experiment did answer the aim which was to investigate which food item was most accurate; in others words, meaning most closest to. Therefore, the aim was to find out possibly which of the three foods, not is, but is closest to the published value of the speed of life. Resultantly, it can be agreed and concluded that this experiment should receive a medium validity.
Reliability - Repetition indicates reliability. The experiment is sufficiently reliable for it had been replicated a few more times with each individual food item. The ending results of the repeated experiments with the original were quite the similar; with variations of only a maximum of 1. Moreover, measuring the nearest-to-nearest distance as well as the furthest-to-further distance between the hotspots provided further precision.
Conclusion
As to conclude, it is evident that the marshmallows most accurately presented the concept of microwaves in the electromagnetic spectrum by its close proximity to the measurement of the speed of light. Despite its worse ability to perform an endothermic reaction (melt) in comparison to the chocolate, the marshmallow managed to produce the result closest to the value of speed of light. This result was not the result hypothesized. The reason for these results may have been due to several underlying factors such as its large size/height, location or contents.