Rutherford’s scattering of alpha particles April 30, 2009
Posted by mrmackenzie in : Higher, podcast , add a comment
In the last part of the Higher course, we looked at the structure of the atom. Rutherford scattering of alpha particles fired at a very thin sheet of gold foil provided the evidence to develop our understanding of the atom from a “plum pudding” model to a “nuclear” atom – where most of the matter and mass are concentrated in the centre, or nucleus, of the atom.
There is a really good youtube video about Rutherford & alpha particle scattering - watch the first 5 minutes only, it goes on to another topic after that. You can also follow the link below (the download link at end of post) to watch an animation of the alpha particle scattering experiment and follow how the results changed our view of the atom.
AH – unit 1 summary notes April 29, 2009
Posted by mrmackenzie in : AH Physics , add a commentThese notes cover the whole of the first unit.
AH simple harmonic motion April 28, 2009
Posted by mrmackenzie in : AH Physics , add a commentWe covered SHM at the end of the 1st unit of the AH course.
Advanced Higher revision April 28, 2009
Posted by mrmackenzie in : AH Physics , add a commentWe’ll complete the course by the end of this week and that means you need to start consolidating all the material we have covered over the year. To help you get underway I have grabbed some AH revision materials in pdf format and am in the process of putting together a series of podcasts with pdf attachments – remember how much you complained that the Higher class were getting stuff on iTunes and you weren’t?
The first set of notes covers circular motion.
Higher unit 3 revision notes April 28, 2009
Posted by mrmackenzie in : Higher, podcast , add a commentYou will get your first chance to sit the unit 3 NAB next week. In the meantime, I have attached a set of revision note for unit 3 to help with your revision.
solution to HW Q4&5 due 24/04/09 April 26, 2009
Posted by mrmackenzie in : Higher, homework solutions, podcast, screencast , add a commentVideo solution to 4(a) attached.
4(b) The critical angle is the angle of incidence that gives an angle of refraction of 90 degrees. Beyond this angle of incidence, no refraction takes place and all light undergoes total internal reflection.
5(a). Refractive index is dependent on wavelength. Each of the colours that make up the white light has a different wavelength, so each colour has a different refractive index. This means each colour is refracted by a different amount.
5(b). Violet, Indigo, Blue, Green, Yellow, Orange, Red.
solution to HW Q3b due 24/04/09 April 26, 2009
Posted by mrmackenzie in : Higher, homework solutions, podcast, screencast , add a commentsolution to HW Q3a due 24/04/09 April 26, 2009
Posted by mrmackenzie in : Higher, homework solutions, podcast, screencast , add a commentsolution to HW Q2c due 24/04/09 April 26, 2009
Posted by mrmackenzie in : Higher, homework solutions, podcast, screencast , add a commentThis video about twice as long as usual. You might want to pause/rewind it at different stages due to the length of the calculation.
solution to HW Q2a&b due 24/04/09 April 26, 2009
Posted by mrmackenzie in : Higher, homework solutions, podcast, screencast , add a comment2(a) You would see a series of interference fringes (spots) on the screen.
Answer to 2(b) attached as video.
