GENERAL HISTOLOGY

INTRODUCTION

MICROSCOPE PARTS MAGNIFICATION RESOLUTION

Question [CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
What do electron microscopes use to focus and magnify an image?
A
glass lenses
B
X rays
C
electromagnets
D
light
Explanation: 

Detailed explanation-1: -The electron microscope uses a beam of electrons and their wave-like characteristics to magnify an object’s image, unlike the optical microscope that uses visible light to magnify images.

Detailed explanation-2: -Electron microscopes use a beam of electrons rather than visible light to illuminate the sample. They focus the electron beam using electromagnetic coils instead of glass lenses (as a light microscope does) because electrons can’t pass through glass.

Detailed explanation-3: -In electron microscopes electromagnetic lenses are used which interact with magnetic properties of beam of electrons and control/ focus them.

Detailed explanation-4: -TEMs have a maximum magnification of around x1, 000, 000, but images can be enlarged beyond that photographically. The limit of resolution of the transmission electron microscope is now less than 1 nm. The TEM has revealed structures in cells that are not visible with the light microscope.

Detailed explanation-5: -Which of the following is used to focus the electrons when using an electron microscope? Explanation: Electron microscopes use beams of electrons instead of light. The electrons are focused by magnetic fields rather than by lenses.

There is 1 question to complete.