As an electromagnetic radiation, x-rays require no medium to propagate. Their energies allow them to permeate most solids.
x-rays
find out the properties of x-rays and compare them with other members of electromagnetic spectrum
The difference is the frequency or the wavelength depending on how you look at it.
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Physical. the more dense an item is, the less x-rays go through.
X-Rays X-Rays from the sun
X-rays is the plural of x-ray
Anything that is electromagnetic radiation has similar properties to light. This can be radio waves, microwaves, infa-red radiation, light, ultra-violet radiation, x-rays, or gamma rays.
X has long been used to denote an unknown quality of quantity and when X-rays where first discovered their exact nature and properties were unknown, so the name X (unknown) ray was chosen.
Soft X-Rays have lower frequency and energy (125ev), than hard X-Rays,(125kev).
With X-ray baggage scanners, a small dose of X-rays is used to illuminate the luggage for inspection. Computers analyze the transmitted rays and analyze luggage properties. Displayed on the screen is a computerized image that indicates which items are dangerous (colored differently).