Your eye contains a part called a lens. Like the lens of a camera, this eye-part focuses light. But unlike the glass lens of the camera, yours is made of living muscle. Like other types of muscle, it can stretch and contract. By changing its shape, the lens can focus distant or close-up objects onto […]
How can you find out the strength of a magnet? In the simple experiment you will learn more about the strength of a magnetic force field.Things Required:Box of small paper clipsBar magnets, several different sizesMasking tapeDirections:Tape the magnet to a table with part of the magnet extending over the edge of the table. Bend open
A versorium is a device that is used to detect a static charge. Its name means “thing used for turning”. It was given this name by its inventor about 400 years ago. Although times have changed, yet the principles that affected this tool haven’t.Things Required:Metal paper clipPaperA piece of wool or feltA pair of scissorsPlastic
You don’t have to be in the desert to see a mirage. Just look down a long road on a hot summer day. Most likely, you’ll see what looks like water or puddles on the road.As you approach this slick strip of road, however, it dries up. What happened? You just experienced a mirage. This
In this experiment we will use the magnetic force to suspend a paper aeroplane.Things Required:Steel straight pinSewing thread, 12 in. (30 cm)Tissue paperBar magnetScissors Directions:Cut a small wing about 1 inches (2.5 cm) long from the paper. Insert the pin through the centre of the paper wing to make an “aeroplane”. Tie the thread to
As the magician chanted the magic words, the rope responded. Slowly, it appeared above the rim of the basket. Up went the rope. Higher and higher it climbed, until its entire length stretched before the audience.Things Required:Plastic foam “peanuts”1-foot-long threadTapeA piece of wool or furBalloon Directions:Break off a segment of thread about a foot in
Close your eyes and look skyward. You can probably tell where the Sun is without looking. The warmth from its rays gives away the position of this nearby star.Imagine what would happen if you were able to concentrate the Sun’s rays. You’d produce a very bright spot. You’d also produce enough concentrated sunlight to burn
Can magnetic force move a floating object? We will try to find an answer to this question by performing this experiment.Things Required:Glass bowl, 2 qt. (2 litre)Sewing needleSewing threadMasking tapeBar magnet Directions:Fill the bowl three-quarters full with water. Cut two 12 inches (30 cm) pieces of thread. Tape both pieces of thread to one side
In this experiment, you will see the static shower of the puffs.Things Required:Section of LuciteTwo thick books (or stacks of smaller ones)Puffed cereal or pieces of plastic foamDirections:Place two thick books about 8 inches apart on a tabletop. The top of the books should reach several inches above the table.Scatter puffed cereal grains or pieces
Using Ray Maker which we have made in our earlier experiment we will try to redirect the rays in this experiment.Things Required:Ray-making tool (from “Ray Maker”)Hand lensClayTorchClear drinking glassWaterA drop of milkDirections:Fill a glass three-fourths full with water. Set this water-filled glass on a flat surface.Position the ray-making tool several inches from the glass. Turn
The function of this experiment is to determine if the north end of a magnet always points to the earth’s magnetic north pole.Things Required:CompassSewing threadSmall paper clipCellophane tapeRulerMagnetBook Directions:Cut a 12-inch (30 cm) piece of thread. Attach one end of the thread to the centre of the paper clip with a very small piece of
Puffed cereal grains are great materials or science experiments. Since they are light in weight, they do not require much force to move. In addition, the puffs easily transfer electric charges. Do you want to see? Just try this next experiment.Things Required:Puffed cereal grainsBalloonA piece of wool or furDirections:Stuff about a dozen grains of puffed
You might have seen some of the popular 3-D movies like “Chota Chetan”. Wow! That guy jumped right out of the screen! How did they make those 3-D effects? If you tried to remove your viewing glasses, you probably were disappointed. The movie looked out of focus. Actually, there were two movies which were projected
Can you find the magnetic north pole by the help of an apple or a tennis ball? In this easy experiment we will show you how you can do it.Thing Required:Apple or tennis ballDirections:Hold the apple in your right hand, and assume it is the earth, spinning on its axis. Wrap your fingers around the
S….0 … S. As the Titanic sank, its radio officer sent out this distress call. Each click of the Morse code’s key temporarily closed an electric circuit. This circuit produced a spark, which created an invisible energy wave that travelled out from the sinking ship. These waves were detected by the antennae of other boats.