Photoreactive compounds are substances that undergo a chemical change when exposed to light. This process often involves the absorption of specific wavelengths of light, leading to a transformation in the compound's structure or properties. These changes can result in various applications, such as in photography, where light-sensitive materials capture images. These compounds are crucial in fields like photochemistry and materials science. For example, photoresists are photoreactive materials used in the production of electronic circuits. By controlling the exposure to light, manufacturers can create intricate patterns on surfaces, enabling the development of advanced technologies.