Homemade spherical lens. Fun physical experience at home

ENTERTAINING EXPERIENCES AT HOME
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Homemade spherical lens. Physical experiments

Entertaining experiments in physics

Entertaining experiences at home / Physics experiments for children

Previous experiences we did with a cylindrical lens as with the simplest one that you can quickly make with your own hands. But it is possible to quickly produce a spherical plano-convex lens. Unfortunately, it has a big drawback: it turns out to be very small in size.

Take a small glass. Wash it well, dry it, and then rub a small area of it with your finger a little (or grease it with the thinnest layer of any fat). Drop a small drop of water from a pipette into this place - and the lens is ready. If it is brought closer to a piece of thin wire or thread, it will be clearly seen how much the wire has increased compared to its continuation next to it.

Our lens, of course, is very imperfect, it gives strong distortion at the edges.

In the descriptions of previous experiments, it was said that various transparent substances refract light rays in different ways. In our experiments, we used water all the time. True, once, when we talked about a two-story lens, we also used castor or vegetable oil and made sure that it refracts the rays of light more strongly than water. But there are other substances available to us that refract light rays much more strongly than water, such as glycerin. It is quite thick, and its drop retains its convex shape well. And the more convex the lens, the more it magnifies. Glycerin should be dropped on the glass, and you will have a highly magnifying plano-convex lens.

Author: Rabiza F.V.

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