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- X-rays
- X-rays are high energy short wavelength electromagnetic radiation (from 10-11 to 10-9 m or from 0.01 to 1 nm).
- Young's modulus
- Young's modulus (E) is in tension or compression of a body below its elastic limit, the ratio of stress to corresponding strain. Since strain is normally expressed on a fractional basis, Young's modulus has dimensions of pressure. Also called elastic modulus.
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