What Would You Say Is an X-ray?
An example of electromagnetic radiation is X-rays. Compared to light, they have a much shorter wavelength. X-rays can pass through human bodies, but light…
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Wavelength
Who Made the First Dish Telescope?
The first dish (or radio) telescope was made in 1942 by an American, Grote Reber, of Wheaton, Illinois. He constructed his apparatus after s
Why Are Some People Color Blind?
Why Are Some People Color Blind? Scientists think that some people are color blind because they have an abnormality of the three pigments in
What Does an X-ray Show?
What Does an X-ray Show? X-rays are electromagnetic rays of very short wavelength which can penetrate matter through which light rays cannot
Why Are Stars Different Colors?
Why Are Stars Different Colors? Stars are many different colors because some of them are hotter than others. Stars are either red, orange, y