Progressively shorter still are x-rays and then gamma rays, the latter with wavelengths shorter than about 10 ... glass plates that allow a narrow range of wavelengths of light to pass through ...

The sun goes through ... light that contains multiple wavelengths at the same time, the VTF, a type of imaging spectro-polarimeter, filters measurable wavelengths one by one. To accomplish this ...

The fun doesn’t stop at germanium. In experiments, thin layers of gold—yes, the real deal—allowed visible light to shine through, provided the metal was reduced to a thickness of 100 ...