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Physics, 22.10.2021 22:40 erick6785

The security scanning machine at the airport produces X-Ray of wavelength 4x10^-10m. What is it’s frequency? (Answer is 7.5x10^17Hz, I just need the working)

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The security scanning machine at the airport produces X-Ray of wavelength 4x10^-10m. What is it’s fr...
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