Introduction
This practical consisted of using a microscope on two different types of samples, human hair and Lily pollen to acquire the basics of using a microscope. Three different types of objective lenses were used (4x, 10X and 40X). Furthermore it gave an insight to particulate matter in the air.
Q1.
Table 1 below shows the diameter of a human hair under previous stated objective lenses
Standard deviation is used in this case to quantify the amount dispersal or variation in the results. The coefficient of variation (CV) also referred to as the relative standard deviation is shown as a percentage and defines the ratio of standard deviation compared to the mean of the results. The coefficient of variation from the 3 samples of human hair as shown above is quite large, this shows that moving from a smaller magnification to a larger one increases the accuracy of the diameter measured. Looking at the difference in CV from the X4 - X40 objective lenses over the three samples illustrates that a much more accurate reading has been obtained as each sample is at least 30% smaller when viewed through the X40 lens.
Q2.
The following table 2 displays the results obtained from measuring the length and width of five samples of Lily pollen.
Table 2 X4 Objective (µm) X10 Objective (µm) X40 Objective (µm) Length Width Length Width Length …show more content…
Although it only accounts for approximately 0.4% of the earth’s atmosphere it is arguably the most important as it is the element which anchors all organic substances from fossil fuels to DNA together. Carbon is relatively a dynamic element moving between atmospheric, terrestrial and oceanic pool relatively quickly. The global carbon cycle is thought to have 4 major sinks, or deposits of carbon, which are all interlinked with pathways of exchange between them. They are as
This practical consisted of using a microscope on two different types of samples, human hair and Lily pollen to acquire the basics of using a microscope. Three different types of objective lenses were used (4x, 10X and 40X). Furthermore it gave an insight to particulate matter in the air.
Q1.
Table 1 below shows the diameter of a human hair under previous stated objective lenses
Standard deviation is used in this case to quantify the amount dispersal or variation in the results. The coefficient of variation (CV) also referred to as the relative standard deviation is shown as a percentage and defines the ratio of standard deviation compared to the mean of the results. The coefficient of variation from the 3 samples of human hair as shown above is quite large, this shows that moving from a smaller magnification to a larger one increases the accuracy of the diameter measured. Looking at the difference in CV from the X4 - X40 objective lenses over the three samples illustrates that a much more accurate reading has been obtained as each sample is at least 30% smaller when viewed through the X40 lens.
Q2.
The following table 2 displays the results obtained from measuring the length and width of five samples of Lily pollen.
Table 2 X4 Objective (µm) X10 Objective (µm) X40 Objective (µm) Length Width Length Width Length …show more content…
Although it only accounts for approximately 0.4% of the earth’s atmosphere it is arguably the most important as it is the element which anchors all organic substances from fossil fuels to DNA together. Carbon is relatively a dynamic element moving between atmospheric, terrestrial and oceanic pool relatively quickly. The global carbon cycle is thought to have 4 major sinks, or deposits of carbon, which are all interlinked with pathways of exchange between them. They are as