X-rays
Dense tissues absorb more X-rays than soft tissues. This topic is part of Physics within Science & Nature. This page currently draws on 13 supporting questions, with answers and bonus facts available below.
X-rays trivia questions
X-rays are commonly used in medicine to create images of what?
Answer: Bones and internal structures
Bonus fact: Dense tissues absorb more X-rays than soft tissues.
X-rays are what type of radiation?
Answer: Electromagnetic
Bonus fact: They have shorter wavelengths than ultraviolet light.
Who discovered X-rays in 1895?
Answer: Wilhelm Conrad Röntgen
Bonus fact: Röntgen named them X-rays because their nature was initially unknown.
Does MRI use ionizing X-rays to create its standard images?
Answer: No
Bonus fact: MRI relies on nuclear magnetic resonance rather than ionizing radiation.
Whose 1895 discovery of X-rays transformed the ability to examine structures inside the living body?
Answer: Wilhelm Conrad Röntgen
Bonus fact: X-rays became a major new tool for anatomic localization without surgery.
What substance is commonly injected during X-ray angiography to make vessels visible?
Answer: Contrast dye
Bonus fact: Radiopaque contrast highlights blood vessels on X-rays.
What substance is often injected before an X-ray angiogram?
Answer: Contrast dye
Bonus fact: Contrast material makes blood vessels visible on X-rays.
X-ray imaging uses what type of radiation?
Answer: X-rays
Bonus fact: X-rays pass through soft tissue more readily than bone.
What is a photon?
Answer: A quantum of electromagnetic radiation
Bonus fact: Visible light, radio waves, X-rays, and gamma rays can all be described in terms of photons.
Gamma rays have higher frequency than what?
Answer: X-rays
Bonus fact: Gamma rays occupy the highest-energy end of the spectrum.
Gamma rays have shorter wavelengths than what?
Answer: X-rays
Bonus fact: Their extremely short wavelengths correspond to very high frequencies.
Why do bones appear bright on many X-ray images?
Answer: They absorb more X-rays
Bonus fact: Dense calcium-rich bone blocks much of the beam.