-Instrument Introduction

The instrument uses electric heating method to heat and drives the plane mirror by the linear expansion of the metal sample. The Michelson interference path changes the interference fringes due to the optical path difference, and the length change of the sample is measured, thereby measuring the coefficient of linear expansion. Compared with methods such as steam heating and light leverage, it has the advantages of small size, short sample length, low power consumption, and high accuracy.

-Experimental content

Measuring the coefficient of linear expansion of metals

Received the 3rd National College Physics AwardThird Prize in Experimental Teaching Instrument Evaluation

-Basic configuration and parameters