Metals have metallic luster means :
They are lustrous in pure form.
They are lustrous in mixed form .
They are lustrous in sunlight.
They are lustrous in dark.
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Explanation:
Metals are lustrous because of the free electrons present in them. The free electrons can move freely in the metal causing any light incident on them to get reflected back. This reflection is specular reflection rather than diffused and thus the metal surface appears shiny or lustrous.
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Answer:
They are lustrous in pure form.
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