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The energy gap of diamond is 6 eV . a ...

The energy gap of diamond is 6 eV .
a . What does it mean ?
b. What is the value of energy gap in the case of copper ?
c. On the basis of energy gap , explain how substances are classified.

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a. In order to cross the energy barriers , an energy of 6 eV is required .
b. zero
c.
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