Question

    Which of the following glass absorbs ultraviolet rays

    which are harmful for the eyes?
    A Potash glass Correct Answer Incorrect Answer
    B Optical glass Correct Answer Incorrect Answer
    C Crystal glass Correct Answer Incorrect Answer
    D Crooks glass Correct Answer Incorrect Answer

    Solution

    Potash glass are used for chemical apparatus, breakers, flasks, funnels. Optical glass is used for making lenses, prisms and optical instruments like telescopes and microscopes. Crystal glass are used to make decorative items. Crooks glass used to diminish the harmful ultraviolet rays.

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