About this Event
FREE Institute of Physics GENERAL PUBLIC talks across the UK London and Southeast (LSE) region in spring / summer 2026.
Following the success of our 2025 event, the LSE branch and NPL once more showcase the excellence and diversity of NPL science and engineering with talks from the 2025 Rayleigh Award winners; NPL’s prestigious scientific prize.
Location: This in-person and will be held at 37 Caledonian Rd, London on Wed, 6 May 2026, 18:00. Tea/coffee served from 6 - 6.30pm. Lecture starts: 6.30pm for 1hr (with 15mins for questions)
Registration: https://www.iop.org/events/national-physical-laboratory-npl-rayleigh-award-celebration
Capacity: 150
Level: General public / interest. Suitable for students
Cost: FREE
Speakers and abstracts
Ben Ford
A calculable pistonphone for the absolute calibration of hydrophones in the frequency range from 0.5 Hz to 250 H
The demand for traceablze hydrophone calibrations at low frequencies in support of ocean monitoring applications requires primary standard methods that are able to realise the acoustic pascal. We will describe the use of a first of a kind calculable pistonphone for the primary calibration of hydrophones at low frequencies.
Helen Margolis
The CIPM list ‘recommended values of standard frequencies’: 2021 update
This talk will trace a twenty-year journey in international metrology, transforming how standard reference frequencies are derived from global clock comparison data. These advances play an essential role in preparations for a future redefinition of the second based on one or more optical transition frequencies.
For details of talks in this spring / summer 2026 lecture series please click
For details of our Rayleigh Award celebration showcasing the 2025 winners, click
Event Venue
Institute of Physics, 37 Caledonian Road, London, United Kingdom
