AQA A Level Physics复习笔记3.5.3 Fibre Optics
Fibre Optics Fibre optics utilise the phenomenon of total internal reflection to send high speed light signals over large distances These have many important uses, including: Communications,...
AQA A Level Physics复习笔记3.5.2 Snell's Law
Snell's Law Snell’s law relates the angle of incidence to the angle of refraction, it is given by: n1 sin θ1 = n2 sin θ2 Where: n1 = the refractive index of material 1 n2 = the refractive in...
AQA A Level Physics复习笔记3.4.2 The Diffraction Grating
The Diffraction Grating A diffraction grating is a plate on which there is a very large number of parallel, identical, close-spaced slits When monochromatic light is incident on a grating, a...
AQA A Level Physics复习笔记3.3.5 Required Practical: Young's Slit Experiment & Diffraction Gratings
Required Practical: Young's Slit Experiment & Diffraction Gratings Equipment List Resolution of measuring equipment: Metre ruler = 1 mm Vernier Callipers = 0.01 mm Young’s Double-...
AQA A Level Physics复习笔记3.3.4 Developing Theories of EM Radiation
Developing Theories of EM Radiation Isaac Newton (1672) Newton proposed that visible light is a stream of microscopic particles called corpuscles However, these corpuscles could not explain ...
AQA A Level Physics复习笔记3.3.3 Young's Double-Slit Experiment
Double Slit Interference Two Source Interference For two-source interference fringes to be observed, the sources of the wave must be: Coherent (constant phase difference) Monochromatic (sing...
AQA A Level Physics复习笔记3.3.2 Demonstrating Interference
Interference & Diffraction of a Laser Interference and diffraction of lasers can be demonstrated with slits or diffraction gratings For light rays, such as a laser light through two slit...
AQA A Level Physics复习笔记3.2.4 Required Practical: Investigating Stationary Waves
Required Practical: Investigating Stationary Waves Aims of the Experiment The overall aim of the experiment is to measure how the frequency of the first harmonic is affected by changing one ...
AQA A Level Physics复习笔记3.2.3 Harmonics
Harmonics Stationary waves can have different wave patterns, known as harmonics These depend on the frequency of the vibration and the situation in which they are created These harmon...
