1.1 magnification & resolution

what is magnification

magnification is how many times larger an image is than an actual object

what is resolution?

resolution is the ability to distinguish between two separate points

convert 20mm into um

20mm is 20,000um

convert 340nm into um

340nm is 0.34um

what is the equation for magnification

magnification = image/actual size

rearrange the magnification equation to make actual size the subject

actual size = image size/magnification

rearrange the magnification equation to make image size the subject

image size = actual size x magnification

what is an eyepiece graticule?

eyepiece graticule is a small scale placed within the eyepiece

what is a stage micrometer

stage micrometer is a glass slide with a scale measured in um

describe steps to calibrate an eyepiece graticule

1) fix a stage micrometer onto the stage

2) Look through the eyepiece to line up the micrometer and the graticule.

3) Count the number of graticule divisions that fit into one micrometer division. 

4) Use the formula below to calculate the size of each graticule division.

graticule division = size of one micrometer division / number of graticule divisions