What is ultraviolet radiation?

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Prepare for the Surface Methods - Liquid Penetrant Inspection (LPI) Exam. Utilize flashcards and multiple-choice questions with detailed hints and explanations. Ace your exam with confidence!

Multiple Choice

What is ultraviolet radiation?

Explanation:
Ultraviolet radiation is the part of the electromagnetic spectrum with shorter wavelengths than visible light but longer than X-rays, placing it between visible light and X-rays. Its wavelengths are roughly from about 10 nanometers up to 400 nanometers. Because UV photons have higher energy than visible light, they can excite certain dyes to fluoresce. In fluorescent penetrant inspection, a penetrant dye is excited by UV light and emits visible fluorescence, helping you see tiny surface defects that might be missed under ordinary lighting. The other ranges describe infrared, higher-energy X-ray/gamma, or radio/microwave regions, which do not describe ultraviolet.

Ultraviolet radiation is the part of the electromagnetic spectrum with shorter wavelengths than visible light but longer than X-rays, placing it between visible light and X-rays. Its wavelengths are roughly from about 10 nanometers up to 400 nanometers. Because UV photons have higher energy than visible light, they can excite certain dyes to fluoresce. In fluorescent penetrant inspection, a penetrant dye is excited by UV light and emits visible fluorescence, helping you see tiny surface defects that might be missed under ordinary lighting. The other ranges describe infrared, higher-energy X-ray/gamma, or radio/microwave regions, which do not describe ultraviolet.

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