See the atoms creating a scatter pattern. The left is the incident ray and the right is the scattered pattern.
Saturday, June 13, 2009
Sunday, June 7, 2009
Homework Register
3. 6/7/09 complete all question pages 3 -7 of Surfing Physics as given.
- identify data sources, gather, process, analyse information and use available evidence to assess the impact of the invention of transistors on society with particular reference to their use in microchips and microprocessors
identify data sources, gather, process and present information to summarise the effect of light on semiconductors in solar cells
Saturday, May 23, 2009
Monday, May 18, 2009
Hertz Planck Einstein
In Section 2 of ideas to implementation we look at how the radio oscillator discovered by Hertz lead to an understanding of the photoelectric effect its implementation in the Phototube that converts light levels to current.
Hertz discovered that a rapidly changing electric field of an antenna transmits energy through space.
He proved that this was light through speed and optics measurements
His oscillator was known as a Hertz Linear Oscillator
Hot objects were known to emmit light that relied solely on their temperature.
The quest was on find out how HLOs model and a single variable T would give the Black Body radiation spectrum.
A black body radiator is defined as absorbing all light that falls on it, reflecting none. Therefore all its light is produced inside the volume of the object.
Planck considered an "Ensemble" of HLOs as a model of a BBR spectrum.
A spectrum is a graph of how much light is produced at each frequency.
An ensemble means considering all possible HLO,
low fequency ones are large so there are fewer, high frequency ones are smaller and more numerous.
The high frequency one were missing.
Planck had a mathematical insight of Energy Quanta he also called "free rooms of action".
Many people think that this means there is discrete energy jumps, however Planck described the modern concept of a wave packet mathematically.
Einstein gave a physical interpretation to Energy Quanta of light by describing a Photon.
The low frequency end fitted, however
Hertz discovered that a rapidly changing electric field of an antenna transmits energy through space.
He proved that this was light through speed and optics measurements
His oscillator was known as a Hertz Linear Oscillator
Hot objects were known to emmit light that relied solely on their temperature.
The quest was on find out how HLOs model and a single variable T would give the Black Body radiation spectrum.
A black body radiator is defined as absorbing all light that falls on it, reflecting none. Therefore all its light is produced inside the volume of the object.
Planck considered an "Ensemble" of HLOs as a model of a BBR spectrum.
A spectrum is a graph of how much light is produced at each frequency.
An ensemble means considering all possible HLO,
low fequency ones are large so there are fewer, high frequency ones are smaller and more numerous.
The high frequency one were missing.
Planck had a mathematical insight of Energy Quanta he also called "free rooms of action".
Many people think that this means there is discrete energy jumps, however Planck described the modern concept of a wave packet mathematically.
Einstein gave a physical interpretation to Energy Quanta of light by describing a Photon.
The low frequency end fitted, however
Tuesday, May 12, 2009
Implementation of Cathode Rays
Draw the various parts
What two forces were balanced. F = Eq, F =qvBsin(theta) F = mv^2/r, (E = V/d)
Cathode Ray Oscilliscope
What two forces were balanced. F = Eq, F =qvBsin(theta) F = mv^2/r, (E = V/d)
v =E/B qvB = mv^2/r q/m = E/(B^2r)
Cathode Ray Oscilliscope
Heater causes emission
The lens bens electrons depending on their distance from the center. The central field has no defection.
TV's have magnetic field coils
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About Me
- drhill
- I come from a Science family: My father Geoffrey Hill was Australia's first computer programmer on CSIRAC the fourth computer in the world. He is credited with invention of Computer music and the development of “Interprogram” a language before Basic. My PhD is in Atomic and Molecular Physics. I have researched the activated oxygen layer above the ozone layer, and 'Assigned' the world's smallest molecule. At the University of Toronto I researched high power UV lasers. I have specialized in automation in fibre optics. This developed into research in Machine Intellect and Robots. I have enjoyed work as an Explainer with Questacon and my time as a part-time soldier. I currently teach High School Science at Epping Boys’ High.