Many thanks for your comments, the slide has been amended so the object is now at 2F.
Posted on 1st June 2017
Looks great! Object at 2F image is, however, the same diagram as the previous one - I.e. Beyond 2F. Minor error, but may confuse pupils. This is the PDF, I can't try the PPT on my iPad as it doesn't load. Look forward to trying on a proper computer in due course.
Posted on 30th May 2017
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