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Physics Concept
Your depth perception depends on the use of both eyes. Each eye sees a different image and your brain combines those images into one. At the same time your eyes triangulate the di...
You can make a simple magnifier with just your fingers. Pinch together your thumbs and forefingers so that a small hole is formed at point where they pinch together. Put a book with small print on ...
There is an interesting related magnifier effect that I saw first when I put some oil into a pot for boiling spaghetti. Put a few drops of clear cooking oil into a pan that has about an inch of wat...
Physics Concept
This uses a drop of water instead of a curved glass to make a magnifier - or demagnifier. If the water meniscus is above the top of the straw you have a magnifying glass.
If the...
Physics Concept
Light is bent by the shape of a transparent object and by its index of refraction. The index of refraction of a material = (speed of light in vacuum)/ ( speed of light in the mate...
Physics Concept
We are able to determine where sounds come from because we have two ears, a smart brain, and because sound travels at 330 m/s (about 1000 feet/second)
Most people can determine ...
Physics Concept
The corruga horn works like the soda straw oboe except that the Bernoulli effect draws the air through the horn, and the corrugations, not reeds, cause the air column to vibrate. ...
Physics Concept
All musical instruments involve something that vibrates the same way over and over again. In this case the air in the soda straw produces the sound. The tabs on the straw act like t...
Physics Concept
This is an illustration of a type of wave in which each object rotates. It is also a model for how the ribs are mounted on a persons spinal column, or the ribs of a fish. Torsiona...
Physics Concept
Where is the North pole on a flat magnet of the type that you use to post notes on the refrigerator at home? The answer is that there are several north and south poles. You can le...
Physics Concept
Some foods are fortified with iron by adding elemental iron, sort of like iron filings. Iron filings may not seem very digestible but they taste better than chicken liver in your ...
Physics Concept
Most of the strength of a magnet is at the poles. The rest of the magnet does not exert a magnetic force.
Materials
Magnet and paper clips
Method
Hang paper clips on a ...
Physics Concept
Making a simple compass. The paper clip always lines up parallel to the magnetic field lines.
Materials
Nail and a magnet, paper cup, thread and a paper clip.
Method
Strok...
Physics Concept
An insulator can still have a charge induced on it. Every object has positive and negative charges. The proximity of another charged object causes these charges to move so that th...
Physics Concept
Different materials respond in different ways to electric fields depending on their ability to hold a charge. An uncharged grain of salt becomes polarized when another charged...
Physics Concept
Static electricity can be produced by rubbing objects together. This is called triboelectricity (electricity produced by friction). When the two objects rub, electrons from one obje...
Physics Concept
An electrometer is an instrument used to detect electric charges. Electrometers use the fact that like charges repel. There are many simple ways to make electrometers.
Materials
...
Physics Concept
This illustrates the storage of energy much like the Phrog. Keep your eye open for the physics in toys! The reason most toys are fun is that they involve the principles of physics! ...
Physics Concept
Objects can lose or gain energy when they collide with other objects. The big basketball loses energy when it bounces from the floor. The little basketball gains energy when it hi...
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