The Young's Modulus Apparatus is a vernier-type instrument designed for the experimental determination of the relationship between a load applied to a wire and the resulting extension. It is a fundamental tool for physics instruction in materials science and elasticity. The apparatus consists of an engraved brass scale 10 cm long with a vernier reading to 0.1 mm, complete with a tension weight. This precision allows students to measure small extensions accurately and calculate Young's modulus for different wire materials.