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from mrmackenzie
These Bitesize pages will help if you need to recap on the basics of magnets. A magnetic field is produced whenever current flows through a wire. The magnetic field is represented by a series of concentric circles around the wire, as shown below. Magnetic field lines around a current carrying wire. image: physick wiki The direction … Read more
from mrmackenzie
An electric field can be used to accelerate charged particles. Conservation of energy tells us that the work done by the field is equal to the change in the particle’s kinetic energy. The speed of the particle can be determined if its charge and the accelerating voltage are known. These notes show how to perform the calculation. … Read more
from mrmackenzie
At the end of Our Dynamic Universe, we considered big things like stars, galaxies and the Universe itself. Now the Particles and Waves unit brings us to particles so small we need groups of them just to make a single atom. Is there a connection? Why do we study particles? from mr mackenzie on Vimeo. The Standard Model An elementary … Read more
from mrmackenzie
We’ve been looking at the photoelectric effect this week. In this video, Professor Dave reviews some of the points we covered in class. Click on the picture below to download a simulation to investigate the effect of irradiance on frequency on photocurrent. You’ll be prompted to install Java if you don’t have it already. Once … Read moreschool closure work for Higher class
from mrmackenzie
Remember that your unit assessment for P&W will take place at the end of this week. The attached notes might be helpful during your revision.
from mrmackenzie
An electric field can be used to accelerate charged particles. Conservation of energy tells us that work done by the electric field = change in the particle’s kinetic energy The speed of the particle can be determined if its charge and the accelerating voltage (potential difference) are known. The notes attached to the end of this post … Read more
from mrmackenzie
At the end of Our Dynamic Universe, we considered big things like stars, galaxies and the Universe itself. Now the Particles and Waves unit brings us to particles so small we need groups of them just to make a single atom. Is there a connection? Why do we study particles? from mr mackenzie on Vimeo. The Standard Model An elementary … Read more
from Mr Mallon @ Helpmyphysics
from mrmackenzie
We met refraction during the National 5 course. At Higher level, we are interested in the relationship between the angles of incidence (θi) and refraction (θr). Snell’s law tells us that Usually material 1 is air, and so . This simplifies Snell’s law to where n is the absolute refractive index of material 2. Since … Read more
from mrmackenzie
red laser beam passing through a diffraction grating. image: en.academic.ru Diffraction is a test for wave behaviour. When a ray of light passes through a diffraction grating, the energy of the incident beam is split into a series of interference fringes. Constructive interference is occurring at each location where a fringe (or spot) is observed … Read more