Abstract: The conventional experimental setup of Youngs modulus measurement based on optical lever method has been believed to exhibit some disadvantages such as high operational requirements and relatively low data accuracy, making it difficult to meet the needs of highquality teaching. Here, we employed a new method to improve the traditional experimental setup through using air wedge instead of optical lever, thereby this setup is characterized by its integrated design, which saves space. A pulley is added to change the direction of the wedge angle, which expands the angle and increases the measurement range. In addition, a vernier caliper is designed to improve the measurement accuracy of the metal wire.

Key words: youngs modulus, optic wedge interference, data accuracy