Magnification Calculate true size image size and magnification

Magnification • Calculate true size, image size, and magnification • Make unit conversions

Units Unit How many millimeters Millimeter (mm) 1 mm Micrometer (μm) 0. 001 mm Nanometer (nm) 0. 000001 mm

Conversions mm into μm (x 1000) μm into nm (x 1000) 32. 5 mm is how many μm? 32 500

Calculations… Write the equations for each Size of image (I) True size (T) Magnification (M)

Figure 5. 1 Paramecium caudatum Find the true size (T) x 600

Figure 5. 1 Paramecium caudatum Measured length = 142 mm x 600

Figure 5. 2 x 9000 chloroplasts

Figure 5. 2 chloroplasts Mean measured length of the four largest chloroplasts = 39. 25 mm x 9000

Figure 5. 3 a bacterium (actual size = 0. 002 mm) Calculate the magnification (M) Measured length = 128 mm

Figure 5. 4 seven week human embryo

Figure 5. 4 seven week human embryo If you have a scale bar… Measure the actual length of the scale bar (25 mm) and divide by the length it represents Magnification = 25 ÷ 10 = x 2. 5

Figure 5. 5 head of a fruit fly

Figure 5. 5 head of a fruit fly A length of the scale bar - 12. 5 mm

Figure 5. 6 pollen grain

Figure 5. 6 pollen grain (a) A length of the scale bar – 25 mm Magnification = (b) Image size = 47 mm. What is the true size?

Figure 5. 7 red blood cells in an arteriole

Figure 5. 7 red blood cells in an arteriole Measured length of scale bar = 30 mm Magnification = Image size (diameter of RBC) = 25 mm Actual diameter =

Figure 5. 8 a mitochondrion

Figure 5. 8 a mitochondrion Measured length of scale bar = 30 mm Magnification = Measured width = 34 mm Actual width =