Light Microscope Basics
Light microscopes are brilliant tools that use two convex glass lenses to magnify tiny objects, but they've got limits. They can only resolve images that are 0.2 micrometers apart - that's because light waves themselves restrict how much detail you can see.
You'll need to master the magnification formula: Magnification = size of image ÷ size of real object. This equation pops up in exams regularly, so get comfortable with it! Resolution is equally important - it's the minimum distance apart that two objects can be seen as separate things.
When you peer through a light microscope, you'll spot different structures in plant and animal cells. Plant cells show off their cell walls, chloroplasts, and large vacuoles, whilst animal cells reveal centrioles and other organelles. Some structures like ribosomes (25nm) are too small to interfere with light waves, so they're tricky to see clearly.
Quick tip: Remember that anything smaller than the wavelength of light (400nm) becomes difficult to distinguish clearly under a light microscope.
