Lamp carousel. Fun physical experience at home

ENTERTAINING EXPERIENCES AT HOME
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Lamp carousel. Physical experiments

Entertaining experiments in physics

Entertaining experiences at home / Physics experiments for children

The transfer of heat by moving layers of gaseous or liquid matter is called convection. This phenomenon is of great practical use. So, for example, in a heated room there is a circulation (circulation) of warm and cold air, as a result of which the room heats up. With central water heating, water particles heated from below are displaced upwards by heavier cold parts. There is a continuous circulation of water, as a result of which the pipes that heat the room are heated.

Using this phenomenon, you can arrange original turntables - a mill (a) and a snake (b). Their device is clear from the drawings.

Carousel on a lamp

Make a rotating lampshade from thin paper or tracing paper and decorate with beautiful ornaments or drawings. To reduce friction when rotating the lampshade, attach one part of the clothes button in the center of its bottom on the underside with wood glue or thread. Hang the lampshade so that the tip of the wire stand gets into the recess of the button.

Carousel on a lamp

Cut out the upper bottom of the lampshade with teeth, which are glued to the conical part. Along the bottom radii, at an equal distance from each other, make eight equal cuts. The length of each slot should be approximately equal to half the radius of the bottom.

Move the slots in the bottom apart: press one edge of each slot down, the other up. The diameter of the bottom of the lampshade should be about three times the diameter of the light bulb.

Instead of a button, you can stick a thick cardboard circle or foil in the center of the bottom with a recess made with a blunt nail or stick.

We recommend interesting experiments in physics:

▪ Water in an overturned glass

▪ Modeling propellers

▪ incendiary ice floe

We recommend interesting experiments in chemistry:

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▪ Detergents from plants

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Random news from the Archive

Contact lenses that project information into the eyes 27.11.2014

Scientists from Princeton (USA) have developed contact lenses that can display visual information directly to the eyes. The project is funded by the US Air Force. The US military hopes to get an innovative device for military pilots as a result.

American scientist Michael McAlpine (Michael McAlpine) and his colleagues have developed a 3D printer that can print contact lenses from five layers, one of which emits light on the surface of the eye. The contact lenses themselves are made from a transparent polymer, inside of which there are several components: silver nanoparticle wiring, nanoscale quantum dot LEDs, and organic polymers, which acted as a material for microcircuits.

According to McAlpine, the hardest part was choosing chemicals that could ensure strong contact between the layers. Another difficulty was the unique shape of human eyeballs: the developers had to monitor the production of a contact lens using two video cameras to ensure it was compatible with the test subject's eye.

It is assumed that the new development will be useful, first of all, for pilots: contact lenses will be able to transmit information about the course of the flight directly to the eyes. In addition, lenses can be embedded with sensors that will detect chemical biomarkers of eye fatigue.

There were also skeptics who doubt the practical value of the unusual development. The problem is that the voltage required to run an LED display is too high, says physicist Raymond Murray of Imperial College London. It will also be necessary to ensure the safety of materials. For example, it is known that cadmium selenide, from which quantum dots are produced, is extremely harmful to health.

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