Spoiler for WW84! In the movie, WW turns a jet invisible which causes the radar to lose its signal. I’m no scientist, but I would think radar would still pick up an invisible aircraft. Since the aircraft is only invisible to the naked eye, radar would still bounce off the aircraft revealing its position. I’m perfectly fine accepting the explanation that this was done just for a good scene. I just want to make sure I’m not an idiot.
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Radio waves and visible light are both made up of electromagnetic radiation. The difference is in the frequency of that radiation. We can only see a narrow band of frequencies that we call visible light. For anything else we need to special equipment. Radar uses radiowaves to be able to “see” very far solid objects, because its really good at bouncing off things.
For something to be invisible to radar and the eye, both radiowaves and visible light would have to pass straight through it.
I don’t think I’ve ever considered whether something invisible would be so for all parts of the EM spectrum! Could you detect the invisible man’s heat signature in infrared? What about ultraviolet?
I will take a more scientific approach. Light is a electromagnetic wave like radio waves. If one was somehow able to make light pass right through a object rendering it invisible. There is no reason to think that they could not make all em waves pass through that same object rendering it invisible to not just the visible spectrum but the entire spectrum of em waves.
Well presumably the “magic” makes the jet not interact with light in anyway (hence why it’s invisible). Radar is also just light (of a wavelength outside the visual spectrum), so presumably it wouldn’t interact with it either. But [also](https://www.google.com/imgres?imgurl=https%3A%2F%2Fi.kym-cdn.com%2Fentries%2Ficons%2Ffacebook%2F000%2F018%2F816%2Fits-magic-i-aint-gotta-explain-shit2.jpg&imgrefurl=https%3A%2F%2Fknowyourmeme.com%2Fmemes%2Fits-magic-i-aint-gotta-explain-shit&tbnid=0LJyiGNdUPOQlM&vet=12ahUKEwiQ2ILJ5fPtAhXJAs0KHZcIClYQMygAegUIARCKAQ..i&docid=kgUZH6UuWqd1kM&w=720&h=479&q=it%27s%20magic%20i%20ain%27t%20gotta%20explain&ved=2ahUKEwiQ2ILJ5fPtAhXJAs0KHZcIClYQMygAegUIARCKAQ)
Radar works by bouncing electromagnetic radiation off of solid objects and recording the resulting signals. If Wonder Woman can render a material transparent to visible light, that is to say electromagnetic radiation in the range of 400 to 700 nm, there’s no reason in pricinciple why she shouldn’t be able to allow radar signals of a different wavelength to pass through it as well.
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