The image can be caught. Fun physical experience at home

ENTERTAINING EXPERIENCES AT HOME
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The image can be caught. Physical experiments

Entertaining experiments in physics

Entertaining experiences at home / Physics experiments for children

However, not every image can be captured. Here, let's say, a virtual image that is obtained in a mirror can only be seen with the eye. It's impossible to catch him. In fact, take a sheet of white paper and try to position yourself with it so that the image given by the mirror appears on this sheet as on a screen. You don't have to try too hard. It still won't work!

But the lens makes it possible to catch an image, get it on a piece of paper, on a screen, on a photographic plate. Recall at least the experience with the incendiary glass. After all, a dazzlingly bright spot that burns through the paper is a captured image of the Sun! Of course, it is reduced: after all, the Sun is very far from us, and there is only one lens. But it is no longer imaginary, but quite real. The paper is on fire!

With the help of a lens, other real images can also be obtained. You can, for example, get on a sheet of paper or on a white wall an image of the window of your room and the street behind it. This experience is best achieved in the evening, when it is still light outside, but dusk is already gathering in the room.

Image can be caught

In a dark room, it is easy to get a real image of a candle. At a distance of 1 m from a burning candle, hold a magnifying glass, and a few centimeters behind it - a sheet of white paper. By moving the magnifying glass back and forth a little, you will soon get a sharp image of a candle on paper. It will be inverted and reduced. Just like the picture of the window in previous experience!

You can also get an enlarged real image of the candle. To do this, the magnifying glass must be brought closer to the candle. The enlarged image will also be upside down. You have seen real images more than once and love them very much. These are images on a movie screen. After all, the lens of a film projection apparatus is several optical glasses, with the help of which a small picture on the film is cast in an enlarged form onto the screen!

Author: Galpershtein L.Ya.

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