Mimicking of gravitational lensing and microlensing in a classroom

Gravitational waves, black hole shadows and exoplanets: Can we make a place for cutting-edge results in schools?
4th Shaw-IAU Workshop
Tuesday Nov. 15, 2022
UTC: 9 a.m. - 10:30 a.m.
, UTC: 8 p.m. - 9:30 p.m.
, Wednesday Nov. 16, 2022
UTC: 8 p.m. - 9:30 p.m.
, Thursday Nov. 17, 2022
UTC: 8 a.m. - 9:30 a.m.

When a point-like object passes between a background light source and an observer, the background illuminance fluctuates due to the gravitational microlensing effect. These objects are called massive astrophysical compact halo objects (MACHOs). In this report, an optical lens corresponding to a gravitational lens was printed using a 3D printer to demonstrate the images of an Einstein ring and a light source. Meanwhile, a process for searching for MACHOs and exoplanets was simulated based on the 3D printed lens, which could well present the total brightness change of the gravitational microlensing effect.


Jun Su is a high school physics teacher. His interests focus on physics
education, astronomy education, International Young Physicists’ Tournament (IYPT) and the Shing-Tung Yau High School Science Award.

Click here for a copy of this poster (PDF file 1.06 MB)