Cell size and magnification + calculations 0.0 / 5 ? BiologyPractical applications of biologyASOCR Created by: Steff06Created on: 29-03-16 11:57 How do you convert mm to um? times (x) by 1000 1 of 15 How do you convert cm to mm? times (x) by 10 2 of 15 How do you convert um to nm? times (x) by 1000 3 of 15 What does um stand for? micrometres 4 of 15 What does nm stand for? nanometres 5 of 15 What is the resolution limit of the human eye? 100nm 6 of 15 What is the calculation to find the magnification? Image size divided by actual size (I/A) 7 of 15 How is the actual size calculated? Image size divided by magnification (I/M). 8 of 15 How would you work out image size? Actual size x magnification (AxM). 9 of 15 How would you work our total magnification? Eye piece lens magnification x objective lens magnification. 10 of 15 If the eyepiece magnification was x15 and the objective lens was x12, what would the total magnification be? 15x12 = x180 11 of 15 If the image size was 50mm and the magnification was x1200, what would the actual size be? Actual = I/M = 50/1200 = 0.0416 x1000 = 41.6um 12 of 15 If the actual size was 40um and magnification was x3000, what would the image size be? Image = AxM = 40x3000 = 120000um/1000 = 120mm 13 of 15 If the actual size was 0.5um and image size was 1.6cm what would the magnification be? M = I/A = 1. 6 x 10 = 16mm x 1000 = 16000um, 16000/0.5 = x32000 14 of 15 If the image size = 80mm and actual size = 50um, what is the magnification? 80 x 1000 = 80000um. 80000/50 = x1600 15 of 15
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