GCSE Biology – Electron vs Light Microscopes

Light Microscopes: Basics and Capabilities00:00:00

Light microscopes utilize a light source and lenses (objective and eyepiece) to magnify specimens. They can be used with live samples and have a maximum magnification of around 400x. While useful for visualizing cells and larger structures like nuclei and chloroplasts, they cannot resolve smaller organelles like ribosomes. Light microscopes offer lower magnification and resolution compared to electron microscopes and are significantly cheaper.

Electron Microscopes: Advanced Imaging00:02:15

Electron microscopes are large, complex instruments requiring considerable space and computer systems. Unlike light microscopes, they can only be used with dead samples. They operate by firing electrons at the specimen, resulting in much higher resolution and magnification, up to 1 million times. This allows for the visualization of tiny subcellular structures like ribosomes and mitochondria, which are invisible under a light microscope. Electron microscopes are considerably more expensive than light microscopes.