Every year as part of British science week Loughborough University opens its doors to the community to host a range of STEM based activities. This year there are several activities organised by my group and in coordination with the UG reps:
I have added rough times for the images below. They are organised by group(s) for the two separate SD cards that were used. If you do not see your photo in the top, please make sure to scroll through to the bottom for the other SD card.
I’m in the process of writing a textbook for the IOP E-book portfolio that will focus on characterisation techniques, in particular for solid state physics.
This will include:
X-ray and Neutron Techniques
Magnetic, Electric, and Thermal Characterisation Techniques.
And will, as far as possible make use of open source data to provide real world problems for students to tackle (focusing on data analysis).
I am therefore, actively looking for journal articles that may use one or more of these techniques and where the original datafiles are accessible. If you have work that you think would be relevant then please contact me. Of course all relevant files and journal articles would be referenced.
Challenge: How can you make a quartz rod invisible with some water, sugar and a beaker?
Answer: Snell’s Law
If we take something that is typically transparent (i.e. the quartz rod) you can normally see it quite clearly when placed in a liquid, by the way in which light is bent as it passes through.
This ‘bending’ of light – refraction – can be described by Snell’s law:
where ‘n’ is the refractive index of the material.
So you might imagine that if we can change the rod, or the liquid itself, so that light entering from behind the beaker does not refract further on entering the quartz rod, we can effectively make the quartz rod invisible. To do this we want to match up the refractive indices ().
With water, as you add more and more sugar the refractive index increases, until finally it approaches that of quartz ~1.46.