Harshit Panwar
Last Activity: 7 Years ago
Lusture is seen only on the freshly cut metal surface because they are exposed it environment just now which tells us that they have started to perform reactions with gases present around just now. Whereas other metal surfaces have been recting from a long period of time due to which they appear dull. So,they are more shiny than other exposed surfaces.
Example :-
When u cut or rub metal or their surfaces with sand paper.
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