How to quickly Calculate Cells Size and Magnification.

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The exam question presents a picture of a cell and asks you how big it is in real life or how much magnification was used to get this image. What do you do? Using this formula (I=AxM).
Image = Actual x Magnification

This is a part of Topic 1.1 in the IB Biology syllabus (2016)

[Coco-tdty]

Thanks a lot, this helped me finish my homework far easier.

[deborahbasemovesfitness]

i must mention too that I love your photos!

[Metabolic_Maurice]

This really helped me in answering some Histology questions

[deborahbasemovesfitness]

Hi Peter, can you explain the magnif. a / magnif b x field size at mag a= field size at mag b formula?

[zakiyatdjabakatie]

Thank you, this was incredibly helpful!

[trif]

Hey peter thank you for this video. Very helpful for preliminary exams!

[TheMrGingerbeards]

Thank you, this really helped me understand!

[salemos]

Sir how about that magnification = size of drawing / size of image where you multiply by 2 and 3 method something like that can u explain it to me if you know it? In the exam you get an image of a spider with no measurement of its actual size. so how to do this?

[aheibamloyanganbameitei]

How do I measure cell volume, provided the image is 2D image captured by Leica icc50?

[feesh]

Is the scale bar on the image the actual length of one cell?