All Subjects
      All Types

        Info

        Grades

        6-12

        Accessibility

        Caption

        Permitted Use

        Stream, Download and Share


        Part of NOVA
        2 Favorites
        114 Views

        Treasures of the Earth | Golden Telescope Mirrors

        Learn why the James Webb Space Telescope uses gold-coated mirrors, in this video from NOVA: Treasures of the Earth: Metals. Gold is an almost perfect reflector of infrared light. The two ounces of gold covering the mirrors of the telescope will allow it to better study the universe in infrared light. A demonstration with a thermal infrared camera shows the difference in reflectivity between an ordinary silver-coated mirror and a gold-coated mirror.

        This resource was developed through WGBH’s Bringing the Universe to America’s Classrooms project, in collaboration with NASA. Click here for the full collection of resources.

        Visit the program page.

        Contributor:
        Funder:

        You must be logged in to use this feature

        Need an account?
        Register Now