Tabletop Michelson interferometer demonstration for teaching wave interference and detector sensitivity¶

Element · All elements
Evidence · no claims cited

Description¶

A tabletop Michelson interferometer used as a demonstration supplementing a modified lesson on wave physics. After reviewing transverse waves and working with a wave-superposition applet, students observed how constructive and destructive interference pertain to the interferometer design; by "applying very slight pressure to a mirror of the device, students developed an appreciation for the extreme sensitivity of the instrument." The authors emphasized that during a gravitational-wave event it is the mirror-splitter distance that changes, not the mirrors themselves.

Design Implications¶

Context¶

Requirements¶

• A tabletop Michelson interferometer with an adjustable mirror knob and projection screen; prior mini-lecture on transverse waves and a superposition applet activity

Constraints¶

• The authors note the demonstration did not include a photodiode; they suggest embedding one and feeding its output to a speaker as a future improvement to make high-frequency pattern changes audible

Target Learners¶

• high school physics or astronomy students

Target Learning Goals¶

• wave interference, interferometer design, and detector sensitivity

Claims¶

Related Elements¶

Examples¶

• Extend the curriculum with student-built interferometer projects and a Bayesian parameter-estimation unit
• Use freely available gravitational-wave education tools and resources, including Black Hole Hunter and Einstein's Messengers

Key Sources¶

• Farr, Schelbert, & Trouille. (2012). Gravitational-wave science in the high school classroom. https://arxiv.org/abs/1109.3720. doi:10.48550/arxiv.1109.3720