Two Side of X Ray: Harmful and Helpful

As we all know , x-rays for what they are: a type of electromagnetic energy. These rays have short wavelengths, allowing them to carry a lot of energy. So when we get the benefit from it , we also must realize the radiation of  mobile x ray , it can do harm for human body.

Then we've learned that medical X-rays give doctors a unique glimpse into the flesh and bone beneath your skin. It gives doctor and patiently a big favor in operation or daily diagnosis.  But how else are they used?

Today x ray is also used in airport or astronomy. In recent years, the U.S. Transportation Security Administration has used x-ray body scanners to detect weapons and other potentially dangerous objects that can't be picked up by metal detectors. This certainly beefs up security for passengers before boarding an airplane, but it also exposes them to x-ray radiation. And in astronomy , Many events in space, ranging from black holes to comets and stars, give off unique radiation signatures. Although we generally clump all X-rays together, the ones coming from space are a bit different. They're created from natural phenomena in the universe that give off immense amounts of energy (and heat).

To measure x-ray radiation, or the energy from particles in space, scientists collect information using satellites outside Earth's atmosphere. Such x-rays give us clues to the origins of the universe and contribute to our perceptions of auroras that routinely line the night sky.

As we'll discuss, X-rays emit a type of radiation that can be harmful to humans if the intensity is too high or the exposure is too frequent. So we must take attention to the x ray ,and protect ourselves from it necessarily .