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0625/6 - Light experiments, Limitations and improvements

Date : 05/03/11 02:32 PM

Alternative to practical examination 0625/6 – Article 1 In light experiments using objects, lenses, source of light and a screen:-

  •  Just make it sure that each item (object, lens and screen ) is aligned so that the centre of each item is at the same height and on the same horizontal straight line.
  •  Always keep the distancesbetween the items at least 100 mm in length.
  • use a fiducial aid when measuring a length.
  • Use a translucent screen.
  •  perform the experiment in a shaded part of the laboratory or in the drak room.
  •  Perform the experiment on horizontal and stable desk or table.

In ray tracing experiments

  • Keep at least 60 mm distance betweenm the object pins (or as much as possible or depending upon the diagram).
  • Make it sure that all the pins are vertical.
  • Always draw the neat and thin lines.
  • Use the largest angles available and draw the arms of the angle longer than the radius of any protractor being used, a large radius is desirable.
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