Jubilee celebrations (50, 60, 75 or 100 years of something)
This article is motivated after the idea of celebrating the centenary of Raman effect in 2028! Therefore, it is worth spending the first part of the article on the information on Raman and his effect.
The only Nobel prize in experimental science in for an Indian scientist working in India was awarded for the discovery of the Raman effect in 1930. The Raman effect was declared open on 28th Feb 1928 by C V Raman as indicated in the newspaper report (Table 1).
Table 1: Newspaper clip of the first annoucement of the effect
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The clip of the newspaper report (given for its authenticity) of the press conference done by Raman on 28th Feb, published on Feb 29, 1928 in The Statesman is reproduced here with courtesy from https://cdn.thewire.in/wp-content/uploads/2021/02/26103606/4_1-scaled.jpg
If you wish to know more about the Raman effect and its legacy there are several links, some of them are as follows:
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We have placed the nomenclature of completing years of some events in Table 2. We have taken an example of years completed by a typical institute (IITM) since its inception.
Table 2: Names of the celebrations after completing several years of a popular event.
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For instance, IIT Madras (IITM) completed its golden Jubilee in 2007-2008. She will celebrate the Platinum Jubilee in 2034 and centenary celebrations will be 2059-60 [A post on centenary of IITM is reserved for another day in future]. |
Year |
Name |
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25 |
Silver Jubilee. रजत जयंती |
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50 |
Golden. स्वर्ण जयंती |
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60 |
Diamond अमृत जयंती |
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75 |
Platinum. हीरक जयंती |
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100 |
Centenary celebrations. शताब्दी समारोह |
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150 200 |
Sesquicentennial (150-year anniversary) |
2031: A year of Sesquicentennial (150-year anniversary) of the Michelson interferometer:
Let us now take a famous, ground breaking experiment with applications in modern science with its other variants, that completes 150 years soon! That is Sesquicentennial (150-year anniversary) of the Michelson interferometer in 2031.
The Michelson interferometer and the Michelson-Morley experiment (MME) and LIGO
The roots of interferometry go back to Newton's rings (during 1670s-1704) and Young's double-slit experiment (during 1801-1803), while the modern interferometer was introduced by Michelson in 1881. Michelson-Morley experiment (MME, in 1887) is one of the most famous experiments in physics.
MME was looking for a medium of propagation for light waves , the same way sound waves need air. Since the sun light appears from sky, they needed a "godly" medium , known as ether wind (not to be confused by diethyl ether). Ether here is a greek word. By the time it was known that earth moves around the sun. Hence, the speed of light could be affected by the wind of the ether- was the question. If the light is parallel to the wind, its apparent speed would be difference than the one travelling perpendicular- which other equipment than the Michelson interferometer (with two light paths mutually perpendicular to each other) would be capable to measure the fringe shift due to this. You may be surprised that exactly the same principle is used to detect the gravitational waves today by Laser Interferometer Gravitational-wave Observatory, LIGO.
Incidentally, I had written a post about LIGO and LIGO-India (yet to be established) in Feb 2016 in this blog (https://champawatsechennaitak.blogspot.com/search?q=LIGO) . Here also the Michelson interferometer is described briefly in HINDI! The comment by Professor S N Thakur on this post is worth reading.]
More later (more updates) on celebrating centenaries.
Prem B Bisht
Oct 26, 2026
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