Question

1. vedie 1. Dispose of the solution in the test tubes in the sink and return the Elodea plants to their original container. Distance from light source (cm) Light intensity (umol m?s4) Vertical distance or volume that solution rose in the volumeter (cm or mL) Gro Group 1 Group 2 Group 3 Group 4 Class Average 74 4 .4 1.25 1.46 .45 1480 122 20cm 440 30cm 1162 1.34 .26 1.8 x .15 .26 . .32 12 .285 .15 1. What is the relationship between light intensity and distance from the light source? Does it follow the inverse square law? 2. On pg. 131 of your lab manual, create a scatterplot graph of light intensity vs. distance (or volume) that the solution rose, using the class average data. What conclusions can you draw from this? Rev. 2020-03-06

Answer 1

There is an inverse relationship between intensity of light to the distance from the light source as we can see from the above experiment as the distance from light source increasing the intensity decrease inversely proprtionally we can conclude it from the class average when the distance was 10 cm it was 1480 but when distance increases to 20 cm the intensity decrease drastically 1/d^2