What is Young's modulus?

Young's modulus E {\displaystyle E} , the Young modulus, or the modulus of elasticity in tension or compression , is a mechanical property that measures the tensile or compressive stiffness of a solid material when the force is applied lengthwise. It quantifies the relationship between tensile/compressive stress σ {\displaystyle \sigma } and axial strain ε {\displaystyle \varepsilon } in the linear elastic region of a material and is determined using the formula:

Young's moduli are typically so large that they are expressed not in pascals but in gigapascals.

Example:

Higher Young's Modulus corresponds to greater stiffness.