What are the valece band and conduction band?

Compare valence band and conduction band.

Assertion: the energy gap between the valence band and conduction band is greater in silicon than in germanium. Reason: thermal energy produces fever minority carriers in silicon than in ghermanium

if the band gap between valence band and conduction band in a matereial is 5.0 eV , then the material is

The picture represents bands of MO s for Si. Label Valence band, Conduction band and Band gap.

Which of the following statements is/are correct/ incorrect? (I) A-bands of the muscle is dark and contain myosin. (II) I-bands are the light bands and contain actin. (II) during muscle contraction, the A-band contracts. (IV) The part between the two H-lines is called as sarcomere. (V) The central part of thin filament, not overlapped by thick filament is called H-zone.

The energy levels of holes are A. in the valence bond B. in the conduction bond C. on the bond gap but dose to conduction band D. in the bond gap but close to valence band

in a good conductor the energy gap between the conduction band and the valence band is

Number of electrons = Number of holes in conduction band and valence band. So that solid is

A lens of focal length f gives diffraction pattern of Fraunhoffer type of a slit having width a. If wavelength of light is lambda , the distance of first dark band and next bright band from axis is given by

Define Valence band in a solid crystal.