A Level Biology Revision "Magnification"

You can find all my A Level Biology videos fully indexed at https://www.freesciencelessons.co.uk/...

In this video, we look at calculations involving magnification. First we explore how to determine the size of organelles from a microscope image using a scale bar. We then look at how we can use an equation to determine the magnification of an image and how to determine the actual size of an organelle.

Image credits:

Pancreatic Acinar Cell
https://commons.wikimedia.org/wiki/Fi...
Louisa Howard, Public domain, via Wikimedia Commons

Bluetongue virus cell
https://commons.wikimedia.org/wiki/Fi...
CSIRO, CC BY 3.0 https://creativecommons.org/licenses/..., via Wikimedia Commons

Macrophage in alveolus
https://commons.wikimedia.org/wiki/Fi...
Louisa Howard, Public domain, via Wikimedia Commons

Cell nucleus
https://commons.wikimedia.org/wiki/Fi...
This file has been identified as being free of known restrictions under copyright law, including all related and neighbouring rights.

Golgi apparatus
https://commons.wikimedia.org/wiki/Fi...
Louisa Howard, Public domain, via Wikimedia Commons

Green ruler
https://commons.wikimedia.org/wiki/Fi...
Luigi Chiesa, CC BY-SA 3.0 https://creativecommons.org/licenses/..., via Wikimedia Commons

Light microscope
https://commons.wikimedia.org/wiki/Fi...
GcG(jawp), Public domain, via Wikimedia Commons