Tara Y Cot Blog

Focus the image on the screen and you can observe the image appearing from behind the screen. However, this time replace the box with a translucent screen. Now you are finally ready for the conclusive experiment, the one that should enable you to understand how some of the most important optical instruments work. However it is necessary to say that this is an extreme magnifying lamp situation: normally a magnifying glass does not exceed 20 X. In a previous article, in which we talked about a little glass-sphere microscope, you could see to what extent a lens can magnify. In the case of the magnifying lens, the magnification power is determined by the following relation: I=250/F, where F is the lens focal length and 250 is the conventional distance for distinct vision or reading.