Microscopes and Images
Getting a clear view of cells isn't as simple as just making them bigger - you need the right tools for the job. Magnification tells you how much bigger an image appears compared to the real thing, whilst resolution determines how much detail you can actually see.
The basic formula you'll need to remember is: Magnification = Image size ÷ Actual size. This pops up in exams regularly, so get comfortable with rearranging it.
Light microscopes are your everyday lab heroes - cheap, easy to use, and brilliant for observing living cells. They magnify up to 2000x with decent resolution, but that's where they hit their limit. Electron microscopes are the superstars, with scanning types creating stunning 3D surface images and transmission types revealing incredible internal detail at over 1,000,000x magnification.
Quick Tip: Remember that electron microscopes kill samples and only show black and white images - any colours you see have been added by computer afterwards!
Laser scanning confocal microscopes offer the best of both worlds, creating 3D images of living cells by focusing at specific depths, though the final image is actually a computer interpretation of laser data.
