"Shapes on the surface of this lens are smaller than the wavelength of light involved: a thousandth of a millimetre." A micron is 1000 nm and visible light is

"Shapes on the surface of this lens are smaller than the wavelength of light involved: a thousandth of a millimetre." A micron is 1000 nm and visible light is about 900 nm and down. Close but no cigar.