# Physics help - lensesWatch

#1
I am extremely confused about converging lenses and diverging lenses. I am looking at all the information but I don't understand how a converging lens magnifies an image. I looked at the diagram and it doesn't make sense, it looks like it does the opposite and makes things look smaller. My teacher refuses to actually explain anything to me so can someone please help?
0
2 years ago
#2
Hiya,

Don't worry, I found lenses very challenging to visualise too! There are some really good GCSE videos on YouTube that explain how they work and the size of the image at different positions (how to work out the size and position on diagrams e.t.c).
0
2 years ago
#3
(Original post by Zoe Lea)
I am extremely confused about converging lenses and diverging lenses. I am looking at all the information but I don't understand how a converging lens magnifies an image. I looked at the diagram and it doesn't make sense, it looks like it does the opposite and makes things look smaller. My teacher refuses to actually explain anything to me so can someone please help?
Hey there,

Magnification actually involves 2 separate lenses. The objective lens collects light and forms and image inside the telescope (low power), and the eyepiece lens actually magnifies it.

If you're talking about just one converging lens, a convex ( converging) lens will act as a magnifying glass if the object is closer to the lens than the focal point. When this is done the rays of light diverge after passing through the lens - to an observer the rays appear to converge at a virtual point (image) behind the lens. This virtual image appears much larger than the object.

Hope I helped!
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