Shades of Light

One of the earliest scanners was made of a machine which allowed three dimensional pictures of the human brain. The scanner allowed doctors to see the living brain in action for the first time.

The machine scanned the brain with X-rays and linked to a computer and a Polaroid camera. The photographs could look at the effects of a stroke, a tumour or a skull injury in just a few minutes.

The scanner took only four minutes to rotate around a person’s head in 180 steps of one degree.

We know that here are much more up to date scanners around today.

It would a wonderful sight, however, to see the results of a room full of 11+ children, all wearing light weight scanners, working on the same paper under the stress of a competitive selection test. Just think of the nervous energy that could be captured. Think of what value it would be to examiners to see a grey mist coming over children’s eyes on question 14.

Remember that Question 14 was the question that asked: `The number of bacteria in a large sealed jar doubles every minute. An hour after the first bacterium was put into the jar and sealed in, the jar is full. When was the jar half full?’

Thank too of the colours on the screen on Question 23.

A horse was tied to a 30 foot rope. How did the horse manage to eat a pile of hay 50 feet away without biting through the rope?

(Answers at the bottom of the blog of the 18th.)