In a photograph taken with a microscope, a cell is 33 mm wide.
Contributed by StemPy LabTry it on paper first. A hint, the key idea and the worked solution are here when you need them.
In a photograph taken with a microscope, a cell is wide. The magnification was 600 times. What is the actual width of the cell, in micrometres?
Need a reminder? The key ideaShow
1 mm = 1000 µm. Size in the picture = actual size × magnification, so actual size = size in the picture ÷ magnification.
The worked solution
Have you tried it?
Work it out on paper first. It is fine to get stuck or make a mistake: that is how we learn. When you are ready, go through the solution one step at a time, and check each step against your own.
Step 1. Divide. .
Step 2. Micrometres. .
Answer: , about the size of a leaf cell.
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