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ADAA X-Ray Practice Exam

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What are x-rays in terms of electromagnetic radiation?
Correct Answer:
High energy electromagnetic waves
Explanation:
X-rays are high-energy electromagnetic waves, meaning they are part of the same family as visible light and infrared but with much higher energy and much shorter wavelengths. Their energy lets them penetrate soft tissues while being more strongly absorbed by dense materials like bone, which is why they create contrast in radiographs. They travel at the speed of light and can be described as photons, showing both wave-like and particle-like properties. This sets them apart from sound waves, which are mechanical waves that require a medium, and from visible light and infrared radiation, which have longer wavelengths and lower energy.

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