Vantablack absorbs 99.965% of all the light at a wavelength of 663nm. The carbon nanotubes are made up of graphene which reflects approximately 30% of the light. How often must the light be reflected in the tube to reach 99.965% absorption

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Vantablack absorbs 99.965% of all the light at a wavelength of 663nm. The carbon nanotubes are made up of graphene which reflects approximately 30% of the light. How often must the light be reflected in the tube to reach 99.965% absorption

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