Microscopes - created from Mind Map

Page 1

Magnification: how much bigger an object appears compared with the original object.

Resolution: is the ability to see two distinct points separately.

Optical microscopes

Laser scanning microscope

Transmission electron microscope

Scanning electron microscope

Magnification up to 2000x

Use visible light wavelength between 400 and 700nm.

Structures closer than 200nm will appear as one.

Use a laser light and assemble by computer.

Have depth selevcivity.

Observe whole living specimens.

Fast travelling electrons with a wavelength of 0.004nm

Form a 2D greyscale image (electron micrograph)

Magnification of 2 million

Cause secondary electrons to bounce off and be focused onto a screen.

magnification up to 200000x

3D balck and white image

Specimen place in a vacuum and coated in metal film