Magnification
Presentation
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Science, Biology
•
9th Grade
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Practice Problem
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Hard
Samantha Argent
Used 19+ times
FREE Resource
5 Slides • 6 Questions
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Magnification
Thursday 21st January 2021
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Open Ended
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Converting Units
When converting from a smaller unit to larger we / 1000. For example, if we had 100 um, this is the same as saying that we have 0.1 mm.
But if we go from a larger unit to a lower unit we x 1000. So for example, if we had 1 mm, this is the same as 1000 um.
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Multiple Choice
What is 200 um in nm?
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Multiple Choice
What is 5000 nm in um?
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Multiple Choice
What is 4 mm in nm?
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IAM Equation
Image size = actual size x magnification
actual size = image size / magnification
magnification = image size / actual size
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If an object has an image size of 2mm and we are using magnification of x1500,what is the actual size?
As we are looking for the actual size, we use A = I / M.
I = 2 mm
M = x1500
A = 2 / 1500
A = 0.001333...
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If the image you observe down a microscope is 6 mm, and the actual size is 3 um, what is the magnification?
I = 6 mm; A = 3um
But first we need to convert 6 mm to um!
6 x 1000 = 6000um
Then to find M we use M = I / A.
M = 6000 / 3
M = x2000
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Multiple Choice
If we were to look at a bacterial cell down a microscope and observe an image size of 2.5 mm, and we are using a magnification of x400, what is the actual size of the bacteria?
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Multiple Choice
Magnification
Thursday 21st January 2021
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