The expanding abilities of different solid materials are different. The co-efficient of expansion of a solid refers to its expanding abilities.
Types of co-efficient of expansion
· Co-efficient of linear expansion(α) or linear expansivity
· Co-efficient of Areal expansion(β) or areal expansivity
· Co-efficient of volume expansion(γ) or volume expansivity
· Co-efficient of expansion refers to the material of solid,not the object.
For example,
Steel Rod Material-Steel
Object-Rod
α belongs to steel not rod.
