Waves and Optics
Waves Simple Wave Motion, Harmonic Waves, Waves Encountering Barriers, Superposition of Waves, Standing Waves, The superposition of Standing Waves, Waves in Three Dimensions The Doppler effect, Beats, Harmonic Analysis and Synthesis, Wave
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Equations (I) and (II) are basic formulations of the uncertainty principle. e.g. the product !px !x cannot be innitesimally small but must equal in magnitude at least Plan
PHYS142/143
Rm 4.110 Ph. 02 42214798 Email: [email protected]
Wave Particle Duality of Light
As we have seen, electromagnetic radiation has two aspects, a wave aspect and a particle aspect. Interference and diffraction of e.m. radiation are explaine
Dual - Nature of Light
It is now recognised that light has a dual-nature. Light can be considered as a particle or a wave - we never need to use both to describe an effect - only one, as each is mutually incompatible.
We will discuss this in more detail l
PHYS142/143
Rm 4.110 Ph. 02 42214798 Email: [email protected]
bookmark
J.J. Thomson and the Discovery of the Electron J.J. Thomson used results from cathode ray tube (CRT) experiments to discover the electron. On April 30, 1897, Joseph John (J.J.) T
FIRST YEAR PHYSICS FIRST PHYS142 & 143
LECTURER: Dr. Carey Freeth
Rm 4.110 Ph. 02 42214798 Email: [email protected]
MODERN PHYSICS Introduction
The physics of the nineteenth Century and before is called classical physics. Mechanics was known to Newt
Phasors This is vector technique for adding large numbers of wave disturbances of angular frequency ( ) but with different phases . A phasor is a vector of magnitude E0 rotating with an angular frequency, . E Eo t
The rules for using phasors are as follow
Constructive Interference y =0
x Where do colours in oil slicks come from? How do we decrease the amount of reflection from a windows surface? Answer: Interference using thin films From week 1
2
Monday, 11 August 2008
1
Monday, 11 August 2008
2
Destructiv
Two lens system I1 and O2 O1
Example Lens 1 is a convex lens with has a focal length of 10 cm, lens 2 is a concave lens with a focal length of 30 cm. An object is 20 cm from lens 1 and on the opposite side from lens 2. The two lenses are 5 cm apart. Where
Optics
Plane Mirrors
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Plane mirrors, Spherical mirrors, Ray diagrams for mirrors, Convex mirrors, Images formed by Refraction, Thin Lenses, Ray diagrams for Lenses, Combinations of Lenses The Eye, The Simple Magnifier, The compound microscope, The telesc
Fermats Principle If a lifeguard wishes to reach a person in the water and needs to travel over sand and water which is the best route to follow given that she can run faster than she can swim.
Let speed on sand =v1, speed in water v2. a y x
1
b
2
2 (a x
Light is a transverse electromagnetic wave a particle only a small part of the electromagnetic spectrum
Ita Carinae Nebulae.
http:/www.astro.princeton.edu/~mbrown/astropic/ ecar.jpg
1 2
Monday, 28 July 2008
1
Monday, 28 July 2008
2
Transverse electromagne
Resonance - Tacoma bridge
Superposition When two waves meet the resultant wave is just the sum of the two separate waves y(x,t) =y1(x,t) + y2 (x,t) The waves do not effect each other as long as the amplitudes of the waves are not too large. Fourier Analys
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