Mercury vapour lamp gives
- continuous spectrum
- line spectrum
- band spectrum
- absorption spectrum
The Correct Option is B
Solution and Explanation
Top Questions on band theory of solids
- Energy band gap is maximum in:
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- An n-type semiconductor is
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- The energy gap of silicon is $1 .1 4 \,eV$. The maximum wavelength at which silicon starts energy absorption, will be $(h = 6.62 \times 10^{-34}\, J\, s$; $c = 3 \times 10^8\, ms^{ -1})$
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- In the energy band diagram of a material shown below, the open circles and filled circles denote holes and electrons respectively. The material is a/an
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Questions Asked in JKCET exam
- The relation between Shear modulus $ (G) $ , Young?? modulus $ (T) $ and Poissons ratio $ (v) $ is _______
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- Which of the following gives Hell-Volhard-Zelinsky $ (HVZ) $ reaction?
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- The "Uplink" satellite communication frequency bands of " $ C $ " band are
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- communication systems
- The three types of expansion that takes place in solid are
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- Of the following, which species is primarily obtained in a solution containing $ KHF_2 $ ?
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- GROUP 2 ELEMENTS
Concepts Used:
Band theory of solids
Band theory of solids expresses the quantum state that an electron takes inside a metal solid. Every molecule comprises various discrete energy levels. In the band theory, you will get to know how the electrons behave inside a molecule.
Energy Bands in Solids:
Valence band
The energy band that consists of the valence electrons' energy levels is called the valence band. The valence band is available just below the conduction band and the electrons of this band are loosely bound to the nucleus of the atom.
Conduction band
The energy band comprises free electrons energy levels, known as the conduction band. For electrons to be free, external energy must be applied such that the valence electrons get struck to the conduction band and become free.
Forbidden band
The energy gap between the valence band and the conduction band is commonly known as the forbidden band which is also known as the forbidden gap. The electrical conductivity of a solid is set by the forbidden gap and the classification of the materials is done as conductors, semiconductors, and insulators.