Magnifying Glass - Find Power in Diopters, Focal Length & Max Magnification (Experiment and Theory)

Описание: I recently bought a magnifying glass and was excited to see things at 3 times their normal size
Unfortunately this was not the case
Upon further inspection this magnifiying glass is not 3 times magnification but rather 3 times power
In this video we will be going over diopter, focal length, and how to determine magnification
So diopter is a measure of lens power which is equal to one over the focal length in meters
Ok so what is a focal length. It is the distance from the lens to the focal point or where the light is focused from.
This can be found by shining light from a far away distance… 93 million miles should do… I got a focal length of 340 mm or .340 meters
Now we can plug this value into the equation and we get a diopeter of 2.94 diopters… which this is where the box gets the 3 times magnification from
So lets see what the focal length in theory should be we can take 1 over the diopeter and we get
A focal length of .333 meters. So the experimental value was close
Now according to 2 sources we can find the magnifications by taking the diopeter over 4 and adding 1…
Doing so we get a magnification of 1.75 times
So the larger the diopeter value the larger the magnification factor
Disclaimer
These videos are intended for educational purposes only (students trying to pass a class) If you design or build something based off of these videos you do so at your own risk. I am not a professional engineer and this should not be considered engineering advice. Consult an engineer if you feel you may put someone at risk.