What Is a Hologram?
A hologram is a physical structure that diffracts light into an image. The term ‘hologram’ can refer to both the encoded material and th
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Objects
What Is Gravity?
When you toss a ball into the air, it comes down because it is pulled to earth by gravity. Gravity is a force that pulls all things on the e
How Does a Magnet Work?
How Does a Magnet Work? A magnet is usually made of iron or steel. Magnets can be of various shapes, but all of them have the ability to pul
How Does Radar Work?
How Does Radar Work? Radar is a system for determining an object’s location, and how far away it is, even though you can’t see it. To detect
Could Man Made Satellites Cause an Eclipse?
Could Man Made Satellites Cause an Eclipse? The planets and the moons have long, tapering shadows pointing away from the sun and the biggest