You have made an essential observation in optics, which is the science of light, and an important field the physics.
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Light deserve to travel through transparent (see-through) materials like glass, plastic or water, however it does not pass v them unchanged. The transparent material has a different density than the air the is travel in, causing the irradiate to change direction inside of it. This is dubbed refraction: that is why observations made through water space distorted or offset and it is likewise how lenses work.
In a lens, light is refracted different ways relying on the curvature of the surface and the material\"s properties. Under the best conditions, this materials have the right to bend irradiate rays come make things look bigger 보다 they space (they have the right to magnify). Plenty of optical devices (binoculars, eye glasses, telescopes, and microscopes) use the same basic ideas the bending light to fool your eye and brain so it shows up to come from bigger or closer objects. The magnification counts on the distances between the lens and also the image and also the lens and the object.
A convex lens curves external in the middle and also can emphasis light rays come magnify one object. Water in a bent container or water droplets (both extremely curved and convex) can thus be an excellent magnifiers.
This is in comparison to a concave lens, which curves inward in the middle and also spreads irradiate rays out. Looking with this kind of lens can help us emphasis our eye on something much away.
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The factor that objects occasionally appear amplified when under water has to do with the curvature the the water surface.For example, when you put a little drop that water on top of an item (you can try this on a postage stamp, or a native on the covering of a magazine), the object looks bigger. The bent surface, unequal a level surface, bends the light together it comes the end from the water, and causes this magnification effect. This effect is very similar to how a microscopic lense or magnifying glass works, except instead that a curved drop that water, the lens if make of a curved piece of glass. The an ext curved the water droplet (or glass lens) is, the greater the magnification. To display that a flat surface of water does not act to magnify objects, just fill a clear cup through a little amount that water and also place it over a newspaperyou will watch that the size of the indigenous is the same contrasted to without the water.