Latest News Archive

Please select Category, Year, and then Month to display items
Previous Archive
18 April 2022 | Story Leonie Bolleurs | Photo Stephen Collett
Prof Ted Kroon
Prof Ted Kroon from the Department of Physics recently delivered his inaugural lecture on the topic What’s the use of a rainbow on the UFS Bloemfontein Campus.

“A rainbow is a natural phenomenon, the result of the refraction and reflection of the sun’s rays in drops of rain. As far as mankind is concerned, it’s a perfectly useless object and won’t make anyone money. Yet the poet who said, My heart leaps up when I behold a rainbow in the sky, only put into word the feeling of wonder and excitement we all have when we see a rainbow.”

“Every day I see a rainbow in my work; I do not need to wait to see one in the sky,” says Prof Ted Kroon, Professor in the Department of Physics at the University of the Free State (UFS), who used this phenomenon to introduce the topic of his inaugural lecture: What’s the use of a rainbow. 

“Far from being only a colourful spectacle with no practical value, rainbows are useful – and lead to useful things,” he believes. 

According to Prof Kroon, one can find examples of real rainbows and rainbow analogies used not only in everyday life, but also in physics. “Besides it being familiar devices in literature, culture, and even marketing, studies of rainbows can yield practical engineering information and may even help us to find new habitable planets,” he says.

Inspired by the many uses of a rainbow

In his lecture, he discussed the basic features of natural rainbows and how they come about. He also explored how the rainbow gives meaning to colour, and how this relates to the temperature of objects. He looked at an array of instances where the rainbow is used; from depicting the life of a star to indicating that we are sick (a thermometer) or when we need to refill a gas cylinder.
Moreover, Prof Kroon pointed out that rainbows are used in computer chips, stress identification, and to transmit internet data through underwater cables of glass fibre. He also referred to how the rainbow was harnessed as an engineering tool to measure refractive index and characterise fine droplet sprays used in industry. 

He continues, “Remarkably, the science developed to understand the natural rainbow can be redirected and applied to the optical properties of metallic nanoparticles, allowing the development of nanotechnology. Knowing how the natural rainbow works and its limitations, better systems have been developed to produce rainbows. Such rainbows have been used to discover new elements and to determine the age of the universe.”

As a member of an international community of phosphor researchers who are privileged to work with rainbows every day, he has used them to study the light-emitting properties of materials doped with bismuth. With this project – an initiative with the African Laser Centre taking place between 2016 and 2021 – he collaborated with the University of Khartoum in Sudan and trained a number of its postgraduate students. “My role included the guidance of students and the measurement and interpretation of the light-emitting properties of the materials. Our research during this time, considering more than a dozen materials, was summarised in 34 scientific publications that contributed to a greater understanding of bismuth ions as light-emitting materials,” he explains. 

Developing new materials, efficient in emitting blue light

He has been developing luminescent materials since 2006, primarily for general lighting (fluorescent tubes and LEDs) and displays (television, computer, and cellphone screens), as well as niche applications in medical and forensic science. 

As part of his current research, he is examining the effect of plasmonic metal nanoparticles on phosphor light emission. He is also exploring materials that absorb infrared light but emit visible light. “For this, I would like to consider the long-term stability of such materials and develop new materials that are more efficient in emitting particularly blue light,” he says. 

Prof Kroon holds a C2 rating from the National Research Foundation and has published more than 150 articles and book chapters, obtaining a Scopus h-index of 26.

News Archive

Fasset continues to fuel academic excellence at the UFS
2017-12-15


  Description: Fasset  read more Tags: Fasset, Accounting, INTRABAS, Finance, South African Institute of Chartered Accountants

  Programme Director: School of Accounting, Prof Hentie van Wyk, and
  Dean: Economic and Management Sciences, Prof Hendri Kroukamp
  excited about the unveiling of the Finance and Accounting Services
  Sector Education and Training Authority (Fasset)
  plaque at the School of Accounting.
  Photo: Rulanzen Martin

The School of Accounting on the Bloemfontein Campus of the University of the Free State (UFS) held an unveiling ceremony for a Finance and Accounting Services Sector Education and Training Authority (Fasset) plaque. The plaque was unveiled by UFS Rector and Vice-Chancellor, Prof Francis Petersen, and Fasset CEO, Lesego Lebuso. This was in honour of Fasset’s partnership with the UFS and its contribution towards driving academic excellence through its Intrabas projects over the past few years.
 
Funding for teaching and learning initiatives
These projects support the development of black student enrolment and performance in Accounting Studies. During the previous year, Fasset gave the UFS R54 million in funding to support teaching and learning initiatives for 960 black Accounting students. These students were enrolled for BAcc, BCom(Acc), BAcc(Hons)/PGDipCA, and BCom(Hons in Acc)/PGDipGA studies. In the same year, a celebratory ceremony was held at the South Campus for 125 Fasset-funded students to celebrate their academic excellence.
 
 Prof Hentie van Wyk, Programme Director: School of Accounting, said, “FASSET funding will give the Centre for Accounting (as it was then called) an opportunity to strengthen our current student-centred teaching model”. This seemed like a prophecy, because at the beginning of 2017, the class of 2016 BAccHons students achieved a 96% pass rate in the 2017 Initial Test of Competence (ITC) examinations of the South African Institute of Chartered Accountants (SAICA).

Millions contributed towards accounting degrees
In 2017, Fasset sponsored 114 students on the Bloemfontein Campus with full bursaries amounting to more than R20 million through the Intrabas bursary fund for degree qualifications in BAccHons, BComHons (Acc), BAcc, BComAcc and BComAcc Extended programmes, as well as the tutorial programme managed by the School of Accountancy. On the Qwaqwa Campus, Fasset has given more than R7 million worth of funding.
 
James Veitch, Senior Officer: School of Accounting, said, “A decision was made to rather fund less students so that they could be assisted with greater effect, and students who did not qualify for the bursaries, would still be assisted through the support programme.”

We use cookies to make interactions with our websites and services easy and meaningful. To better understand how they are used, read more about the UFS cookie policy. By continuing to use this site you are giving us your consent to do this.

Accept