Here is the first ray diagram video formatted for ipod.
podcast
podcasts go in this category for the feed to iTunes
how to draw a ray diagram
If you are sitting Credit Standard Grade or Intermediate 2 you should be able to draw a ray diagram for a convex lens.
At Standard Grade you must be able to draw this diagram for a magnifying glass. A video for this will be posted shortly.
Intermediate 2 candidates may be asked to draw the diagram for an object placed
- closer than one focal length
- between one and two focal lengths
- more than two focal lengths
from the convex lens. I will post a video showing each of these three situations.
Let’s start with an introduction to drawing ray diagrams. This video looks at an object between one and two focal lengths from the lens. It will show you how to draw the diagram and explain the terms we use to describe the image.
how to draw a ray diagram from mr mackenzie on Vimeo.
Disclaimer: No rabbits were harmed in the making of this video.
1992 Higher paper I
I’ve had a request to include the old multiple choice papers in this series of posts. Here is paper I from 1992, there are some written questions at the end of the paper.
There is a complete set of answers for this paper here.
This paper is reproduced to support SQA qualifications on a non-commercial basis according to SQA conditions of use.
Higher 1999 paper II
Here is the 1999 paper.
There is a complete set of answers for this paper here.
This paper is reproduced to support SQA qualifications on a non-commercial basis according to SQA conditions of use.
bad particle physics
The Large Hadron Collider never seems to be out of the news for long, so it makes sense for someone to provide something for non-physicists to help them understand some of the language of particle physics.
Well done to Reuters, who published a short article called Factbox: Glossary of particle physics terms last week. Unfortunately, it’s not entirely correct. Follow the link above and use your knowledge of particle physics from unit 2 of the AH Physics course to correct the errors. It’s always possible that Reuters might pull the article due to the errors so I have attached a pdf of the page below, no excuses!
Thanks to Zapperz for his original post about the article.
Higher 1998 paper II
The 1998 written paper is attached.
There is a complete set of answers for this paper here.
This paper is reproduced to support SQA qualifications on a non-commercial basis according to SQA conditions of use.
Higher 1997 paper II
This is the 1997 written paper.
There is a complete set of answers for this paper here.
This paper is reproduced to support SQA qualifications on a non-commercial basis according to SQA conditions of use.
Higher 1996 paper II
Here is the written paper from 1996.
There is a complete set of answers for this paper here.
This paper is reproduced to support SQA qualifications on a non-commercial basis according to SQA conditions of use.
Higher 1993 paper II
Here is the written paper from 1993.
There is a complete set of answers for this paper here.
This paper is reproduced to support SQA qualifications on a non-commercial basis according to SQA conditions of use.
total internal reflection
By coincidence (pardon the pun!), both Int2 and S3 have reached the stage of investigating total internal reflection at the same time. Here is a photo showing total internal reflection of a laser beam in a tank of water.
I’ve put together a short video showing total internal reflection in a semicircular block and a perspex model of an optical fibre.
total internal reflection from mr mackenzie on Vimeo.