Microscopes

Pregunta	Respuesta
Resolution	Ability to differentiate between 2 close objects
Magnification	How big an image is compared to the object
Equation for magnification	Image: 7d9248b1-fb91-4489-9ef7-574355344ca2 (image/jpg)
Decribe optical microscope	Light focused by lens Light passed through specimen More light absorbed = darker Mag = Eyepiece x Objective lens
Advantages of optical microscope	Cheap Easy to use True colour (may req staining)
Limits of optical microscope	Low resolution (0.2um) Low magnification (1500x)
Decribe SEMs	Directs beam of e- across specimen Image based on e- reflected ( Knocks of e- from spec Gather in cathode ray tube form image on comp ) ADDITIONAL
Advantages of SEMs	High resolution (200,000x) Surface structure 3D High magnification (2nm) Thick spec
Limits of SEMs	Lower resolution than TEM Dead spec Expensive Training B&W / False colour
Decribe Transmission Electron Microscope	Use electomagnets to focus beam on e- transmitted through spec image based on e- absorbed Denser spec = more e- absorp = darker
Advantages of TEMs	High resolution (2nm) images on internal structures High magnification (500,000x)
Limits of TEMs	Thin spec Dead spec Expensive Training B&W / False colour

Resumen del Recurso

	Creado por Nazmin Shafiq hace más de 7 años