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Message: <blockquote data-quote="tobensg" data-source="post: 3756871" data-attributes="member: 10133">If the torch is invisible is the light it gives invisible or does it visibly illuminate an area?Invisibility is the state of an object which cannot be seen.Since objects can be seen by light in the visible spectrum from a source reflecting off their surfaces and hitting the viewer's eye, the most natural form of invisibility (whether real or fictional) is an object which does not reflect nor absorbs light (that is, it allows light to pass through it). In nature, this is known as transparency, and is seen in many naturally-occurring materials (although no naturally-occurring material is 100% transparent).If the light is invisible would you need detect invisibility to see in a dark room or mine illuminated by an invisible torch?Whee!-Toben</blockquote>