Talk:GCSE Science/Uses of static electricity


 * Theresa,


 * Hello :-) wasson

Just to start with a mention of appreciation of the task you are undertaking here with a GCSE textbook in electronic media, (especially on a Wiki). Having worked at UWIC in Teaching and Learning, I know how much work teachers have to do to produce such works, and to provide real learning value for the students.

To this end, I hope you will find some interventions (constructive criticisms and suggestions) useful in your project. Although I have not studied this subject since O Level Physics, Biology and Chemistry in 1987, I attempt continuous education and have read/watched much material on science in general over the passing years.


 * Hence, to start, the photocopier.

During my years in secondary and later education, I was always disappointed when I found some earlier knowledge given to explain one lesson was later overturned (often completely contradicted) by a later lesson.

In the case of the photocopier, you appear to have given light some special properties (assuming that the students have not received preparatory lessons):


 * Light carrying energy : At a point were the reader of your materials is yet away of light travelling in straight paths, and the effects of the primary methods of distortion - reflection and refraction. Later again we learn that light may be considered as a particle/wave with properties including 'carrying certain energies' Suggestion: Avoid mentioning energy being carried by the light, and state that light has 'this effect' (accelorated discharge, but 'discharging' has not been discussed yet) on Statically Charged Surfaces.


 * Angle of Reflection in the Stage 2 diagram : The light source appears to originate from Stage 1, and the angle of the emerging light does not have any similarity (it is supposed to have equivalency) to the angle of the origin. In other words, the image reflected on to the plate would be offset and divergent, magnified and elongated. Although we would not expect the student to know or appreciate this fact at this point of the course, the image shows three rays of light and the effects of a reflection - providing a (possible) first impression that may cause later confusion, (disappointing contradictory learning experiences). Suggestion: Remove the light source and the arrows approaching the page, but leave the arrows from the page to the plate. The reflection will intuitively look like the effect of a mirror, without questions of what light is reaching the plate and from where.


 * Pages Per Minute : A good modern photocopier would not use the process you describe, (they use digital processing and a laser to produce the positive charged, toner [hot]spots), and few are capable of 60ppm. Suggestion: Revise to one page in less than five seconds.

Hope these help.

Ray 12:24, 24 May 2004 (UTC)


 * Ray firstly thank you for you comments. I see you points about the diagram and will make the change you suggest to the picture. As for your other suggestions I am not going to impliment them, because you are. Just go ahead an edit the text. Don't be shy :-) I'm assuming you have not come here from wikipedia else you would not be so hesitant, but all books here are collaborative. I will not be any wayy offended if you edit my work. It's only a first draft, I'm hoping that lots of people will edit it until it becomes the best text book ever written, far better than any book written by only one or two authors. So please make any changes to this or any other page that you think will improve things. Don't worry about if I will like it or not, it's very easy to revert things back to the way they were anyway, so nothing you do can't be undone.

Theresa knott 09:42, 25 May 2004 (UTC)


 * What can I say? "Yes Miss Knott." Quid-pro-quo? Perhaps you could have a read through this work I have started, and provide some feedback: http://en.wiktionary.org/wiki/User:Ray_Cherry/Conceptionary

Ray 22:41, 26 May 2004 (UTC)


 * OK. Photocopier smelly speed adjustments completed. But the explanation of how light might assist the positively charged plate to loose its charge is going to require a change to the structure of the preceding page/section - Static Electricity (GCSE Science).

Ray 11:04, 29 May 2004 (UTC)

ok
oo Hossin Anower (discuss • contribs) 15:22, 12 April 2018 (UTC)