CIE A Level Physics复习笔记9.1.4 Electrical Power
Calculating Electrical Power In “Work, Energy and Power”, Power P was defined as the rate of doing work Potential difference is the work done per unit charge Current is the rate of flow of charge S...
CIE A Level Physics复习笔记9.1.3 Potential Difference
Defining Potential Difference A cell makes one end of the circuit positive and the other negative. This sets up a potential difference (d) across the circuit The potential difference across a compo...
CIE A Level Physics复习笔记9.1.2 Electric Current: Calculations
Calculating Electric Charge Current can also be defined as the charge passing through a circuit per unit time Electric charge is measured in units of coulombs (C) Charge, current and time are relat...
CIE A Level Physics复习笔记9.1.1 Electric Current
Defining Electric Current Electric current is the flow of charge carriers and is measured in units of amperes (A) or amps Charge can be either positive or negative When two oppositely charged condu...
CIE A Level Physics复习笔记8.2.5 The Diffraction Grating
The Grating Equation 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 pattern o...
CIE A Level Physics复习笔记8.2.4 Young's Double Slit Experiment
Double Slit Interference Young’s double slit experiment demonstrates how light waves produced an interference pattern The experiment is shown below Young’s double-slit experiment arrangement When a...
CIE A Level Physics复习笔记8.2.3 Two Source Interference
Demonstrating Two Source Interference Interference of sound, light and microwaves can be demonstrated with slits or diffraction gratings Using Water Waves Two-source interference in can be demonstr...
CIE A Level Physics复习笔记8.2.2 Interference & Coherence
Interference & Coherence Interference occurs when waves overlap and their resultant displacement is the sum of the displacement of each wave This result is based on the principle of superpositi...
CIE A Level Physics复习笔记8.2.1 Diffraction
What is Diffraction? Diffraction is the spreading out of waves when they pass an obstruction This obstruction is typically a narrow slit (an aperture) The extent of diffraction depends on the width...
