We started our study of Einstein’s special theory of relativity this week. Special relativity is tricky get your head round, so I’ve put together a collection of videos that help to explain the ideas we’re going to consider. Let’s start with a video about the speed of light. The next video follows Einstein’s thought process ... Read more
It’s complicated and cosmologists are not certain. One of the issues is only being able to see about 4% of the mass in the universe – the stars, planets, gas and dust. About 25% of the mass of the universe is Dark Matter. It’s “dark” because it doesn’t emit light that enables us to see ... Read more how will the Universe end?
You might remember that we looked at some paradoxes when we studied special relativity earlier this term. Here is another situation where a paradox can arise. The German astronomer Heinrich Olbers (1758–1840) asked why the night sky was dark. At the time, astronomers believed that the Universe was both infinite and steady state (unchanging), so ... Read more evidence in support of the big bang: #3 olbers’ paradox
As we worked through the diagram explaining the stages of the Big Bang model, we looked at a section of the diagram where the Universe was hot enough for nuclear fusion. At this point, hydrogen nuclei were fusing together with other hydrogen nuclei to create helium nuclei. As the Universe expanded, it cooled and further ... Read more evidence in support of the big bang: #2 nucleosynthesis
introduction to the Big Bang from mr mackenzie on Vimeo. Georges Lemaître’s theory of an expanding Universe, which has become known as the Big Bang, was supported by Hubble’s observations. The expanding Universe idea was challenged by influential scientists who believed the Universe was both infinite (and therefore not expanding) and steady state (unchanging). Supporters ... Read more evidence in support of the big bang: #1 CMBR
In the 1920s, Edwin Hubble had access to the Hooker telescope on Mount Wilson, Los Angeles. This was the largest telescope in the world at that time. His first breakthrough was the discovery of a cepheid variable star in the Andromeda nebula. This enabled him to calculate the distance to Andromeda and he quickly realised this was ... Read more the Milky Way is not alone
For the past two weeks, we’ve been looking at equations that describe time and distance changing according to speed. It’s been quite heavy on theory and maths with no supporting evidence to suggest Einstein’s ideas were correct. I want to address that lack of evidence by pointing you to some practical work that had been ... Read more evidence that special relativity is real
New figures have been published today by the Scottish Funding Council examining the higher education sector in Scotland in 2016-17.
Read the key points from the publication:
Commenting on the figures, Further and Higher Education Minister Shirley-Anne Somerville said:
“It is welcome to see in these latest statistics that we have a record number of post-graduate students and increases in both part-time and older learners.
“This Government is determined to make higher education as accessible as possible to everyone in Scotland. We recognise the importance of post-graduate study and providing the opportunities for people to get a higher education qualification later in life. That is why we are enabling even more people to study for a postgraduate qualification in the coming years by expanding access to tuition fee loans and living cost loans to students studying by distance learning.
“What these figures show is that the higher education sector in this country is continuing to go from strength to strength, with colleges playing a vital role in the delivery of many higher education courses across Scotland.”
The post New figures on higher education students at Scottish institutions appeared first on Engage for Education.
We’ve been looking at the photoelectric effect this week. In this video, Professor Dave reviews some of the points we covered in class. Click on the picture below to download a simulation to investigate the effect of irradiance on frequency on photocurrent. You’ll be prompted to install Java if you don’t have it already. Once ... Read moreschool closure work for Higher class
Here is a link to some revision notes for the Our Dynamic Universe unit.