From francis.Bryden at stcuthberts.school.nz Mon Jun 8 15:08:20 2009 From: francis.Bryden at stcuthberts.school.nz (Bryden, Francis) Date: Tue, 9 Jun 2009 10:08:20 +1200 Subject: useful website Message-ID: <6AC36C5F0F8E364CBEC8178DD499F3EF986C78A334@stcc-exchange.stcuthberts.local> This is a website with some useful animations and programmes. There is some really good stuff, especially beats etc. You have to download a plugin from the site. http://www.phys.unca.edu/demonstrations.asp regards, ........ Francis Francis Bryden HoD Physics St Cuthbert's College 122 Market Rd Epsom 1021 PO Box 26 020 ph 64 09 520 4159 x 7808 ________________________________ Please consider the environment before printing this email -------------------------------------------------------------------------------- This message (and any associated files) is intended only for the use of the individual or entity to which it is addressed and may contain information that is confidential, subject to copyright or constitutes a trade secret. If you are not the intended recipient you are hereby notified that any dissemination, copying or distribution of this message, or files associated with this message, is strictly prohibited. If you have received this message in error, please notify us immediately by replying to the message or contacting helpdesk at stcuthberts.school.nz, and deleting it from your computer. Messages sent to and from us may be monitored. -------------- next part -------------- An HTML attachment was scrubbed... URL: From ianlamb at ihug.co.nz Mon Jun 8 17:24:29 2009 From: ianlamb at ihug.co.nz (ianlamb at ihug.co.nz) Date: Tue, 09 Jun 2009 12:24:29 +1200 Subject: Young's Expt. Message-ID: <7f8574b5fa1aec91f86b896c51ef1702@ihug.co.nz> At the Writers and Readers Festival in Auckland I was interested to learn from Marcus Chown that Young's experiment had been done with a single photon. This got me thinking (quite painful at my age) and maybe someone can lighten my state of darkness. As I recall, the experiment was originally done by cutting slits in black material. With a stream of photons you get an interference pattern on the other side. If the slits were cut into a reflecting surface instead of a black one and it was bent into a gentle parabola and angled so that the focus was not in the path of the stream of emitted photons, I would expect the focal point to be a detectable bright spot. There should also be the usual pattern on the other side of the slits. My question is: what would happen if there was a single photon emitted towards the slits? Would it appear at the focal point because it behaved like a wave at the reflecting surface? Would it appear at the focus because it had been reflected as a particle from the surface between the slits? Would there be an interference pattern on the other side of the slits? If light didn't appear at the focus, why not? Why would it be transmitted rather than reflected? Or would it be reflected rather than transmitted? If it is both reflected and transmitted, what does that mean? Would the energy of the photon have been divided? Would it's frequency be different at both locations as a result? The implications are a bit large for my simple mind to deal with but it seems logical as the original experiment doesn't preclude using a reflective surface, it's just that Young used a black one. Has this experiment been done? Ian Lambert From Mo.Skelton at stcuthberts.school.nz Mon Jun 8 17:43:06 2009 From: Mo.Skelton at stcuthberts.school.nz (Skelton, Mo) Date: Tue, 9 Jun 2009 12:43:06 +1200 Subject: No subject Message-ID: <6AC36C5F0F8E364CBEC8178DD499F3EF986C835EE9@stcc-exchange.stcuthberts.local> Hi All I've had a look at the new science / physics matrix (attached). Please note that feedback is required July 3rd through the link below. "Consultation Process Research New Zealand have set up a web site for online consultation. The link is: https://surveys.researchnz.com/NCEA/Registration. This consultation will close on 3rd July 2009, and feedback to the Ministry will be provided by the end of July." Level 2 and 3 matrices are available through the same View Materials option on the survey site. What're your thoughts? Mo Skelton ________________________________ Please consider the environment before printing this email -------------------------------------------------------------------------------- This message (and any associated files) is intended only for the use of the individual or entity to which it is addressed and may contain information that is confidential, subject to copyright or constitutes a trade secret. If you are not the intended recipient you are hereby notified that any dissemination, copying or distribution of this message, or files associated with this message, is strictly prohibited. If you have received this message in error, please notify us immediately by replying to the message or contacting helpdesk at stcuthberts.school.nz, and deleting it from your computer. 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