Method Scientific Diagrams
1) Clean and dry your dish, being aware it is free from any unnecessary solid pieces or liquid to avoid discrepancies
2) Remove the rotating tray from your oven 3) Place the chocolate on top of the plate 4) Place the plate into the oven so that it sits directly in the centre of the oven 5) Cook the chocolate for 1 minute 6) Take out the plate with your oven mitts carefully 7) Allow it to cool for half a minute 8) View the hotspots (they should be slightly hollow) within the chocolate 9) Measure the distance between the centre of each hotspots with your ruler to find the average space 10) Measure the closest-edge to closest-edge distance to determine the lower limits of accuracy 11) Measure the furthest-edge to furthest-edge distance to determine the higher limits of accuracy 12) Divide these figures by 100 so that the results will be metres, not centimetres 13) Repeat steps 1-12 with the cheese and marshmallows, noting your results each time 14) Repeat steps 1-13 twice with each food item to determine a more precise results 15) Sum up your results for the individual food item, divide the figure by the number of rounds (3); then multiply it by two for each food item - this includes the upper and lower limits of accuracy 16) Look at the label on the back of the microwave to find the frequency (in megahertz) of the microwave radiation the oven produces 17) Multiply the frequency by 1 000 000 to have your calculation in hertz 18) Use this figure, the frequency, and multiply it with your results from step 15 for each food item 19) Check to see how closely your calculations is with the published value of the speed of light 20) Determine which food item most accurately presents the speed of light |
VariablesControlled Variable/s - frequency, time, temperature, ruler, plate
Independent Variable - food type Dependent Variable - distance between hotspots and calculated speed of light |