What is a common use of X-rays in non-medical fields?

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X-rays are commonly used in non-medical fields for content verification in security applications. This includes situations such as airport security checks, where X-ray machines are employed to inspect luggage and cargo for prohibited items like weapons or explosives. The ability of X-rays to penetrate materials and provide detailed images allows security personnel to identify hidden objects without physically inspecting each piece of luggage. X-ray technology plays a significant role in maintaining safety and enhances the effectiveness of security measures, making it an invaluable tool in various security settings.

The other options do not accurately reflect established uses of X-rays. Barbecue grilling and television broadcasting do not involve X-rays at all, as they rely on entirely different principles such as heat radiation and electromagnetic waves in the radio frequency spectrum. Heat sensing typically utilizes infrared technology rather than X-ray imaging, which is designed for penetrating and imaging dense materials.