Description: When inverted, a bubble will move from the bottom to the top of the tube. By analogy, holes are like bubbles. They will move to the top of the band (tube) to reach the lowest energy.

This demonstration is also available on on JCE Solid State Resources CD-ROM.

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Source: Ellis, A. et al. Teaching General Chemistry: A Material Science Companion

Year or vol: 1993 page: 240

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