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CBSE Class 12-science Answered

some very old glass objects appear slightly milky instead of being transparent
Asked by Akshansh prasad | 08 Jan, 2014, 04:03: PM
answered-by-expert Expert Answer

Glass is made up of silica. It is partially crystalline and partially amorphous. As time passes due to changes in temperature of the system, it becomes crystalline as some of the atoms become more arranged. It absorbs water and form a layer which results into cloudiness in the galss. Thus the glass turn slightly milky on aging instead of being transparent.

Answered by Prachi Sawant | 09 Jan, 2014, 09:47: AM

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