Microscopes Flashcards
Describe how light microscopes work
Use visible light and magnifying glasses to observe small objects
Describe how electron microscopes work
Use a beam of electrons in a vacuum with a wavelength of less than 1nm to visualise the spectrum
Equation for magnification, size of image, size of object
Size of image = magnification X size of object
Equation for mag of objective lens, mag of eye piece, total magnification
Total magnification = mag of eye piece X mag of objective lens
Type of specimen (light)
Dead or alive
Type of specimen (electron)
Dead
Colour of image (light)
Coloured
Colour of image (electron)
Black and white
Size of machine (light)
Small
Size of machine (electron)
Large
Benefit (light)
Cheap
Benefit (electron)
Better magnification and resolution
Magnification (light)
X500
Magnification (electron)
X500000
Resolution (light)
200nm