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| Main Authors: | , , |
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| Format: | Preprint |
| Published: |
2024
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| Subjects: | |
| Online Access: | https://arxiv.org/abs/2408.04893 |
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| _version_ | 1866917431455252480 |
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| author | Shah, Devashish Kumar, Pradumn Sarin, Pradeep |
| author_facet | Shah, Devashish Kumar, Pradumn Sarin, Pradeep |
| contents | We present a mechanical cantilever-based tabletop interferometer to measure the radiation force exerted by light. Using a high-power (~ 1W) pulsed laser beam, we excite mechanical oscillations in a thin metallic cantilever. The cantilever forms a parallel-plate capacitor with a printed circuit board trace. Using a capacitance-bridge geometry, we measure small capacitance changes of the order of femto-farads, induced by the radiation forces of a few nano-newtons. This experiment uses equipment commonly found in an undergraduate teaching laboratory for physics and electronics while providing insight into electromagnetic wave theory, circuit design for low-noise measurements, and Fourier analysis. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2408_04893 |
| institution | arXiv |
| publishDate | 2024 |
| record_format | arxiv |
| spellingShingle | Measurement of electromagnetic radiation force using a capacitance-bridge interferometer Shah, Devashish Kumar, Pradumn Sarin, Pradeep Physics Education We present a mechanical cantilever-based tabletop interferometer to measure the radiation force exerted by light. Using a high-power (~ 1W) pulsed laser beam, we excite mechanical oscillations in a thin metallic cantilever. The cantilever forms a parallel-plate capacitor with a printed circuit board trace. Using a capacitance-bridge geometry, we measure small capacitance changes of the order of femto-farads, induced by the radiation forces of a few nano-newtons. This experiment uses equipment commonly found in an undergraduate teaching laboratory for physics and electronics while providing insight into electromagnetic wave theory, circuit design for low-noise measurements, and Fourier analysis. |
| title | Measurement of electromagnetic radiation force using a capacitance-bridge interferometer |
| topic | Physics Education |
| url | https://arxiv.org/abs/2408.04893 |