MCQ
The band spectrum is caused by :
- ✓Molecules.
- BAtoms.
- CAny substance in solid state.
- DAny substance in liquid state.
✓
Answer
Correct option: A.
Molecules.
The band spectrum is caused by molecules. The energy levels of molecules are so close to each other that they combine to form a band. The valence band and conduction band are two types of bands. Electron transition between these two bands forms band spectrum.
For example a spectrum of air. The bright bands are due to molecular oxygen $\ce{(O_2)},$ molecular nitrogen $\ce{(N_2)},$ and other molecules.
For example a spectrum of air. The bright bands are due to molecular oxygen $\ce{(O_2)},$ molecular nitrogen $\ce{(N_2)},$ and other molecules.
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