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here u go!fiber-Optics
Mirrors
Sonar
Radar
Study of seismic waves
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optomety-contact/corrective lensesbinoculars periscopes and refracting telescopes and refracting telescopesmangnifying glassknowledge of refraction creates the most sparkly diamondsprisms to divdide white light into it's into it's component colourscertain optical illusions