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Electromagnetic Radiation (EMR SPECTRUM: Classified into several types…
Electromagnetic Radiation
Electromagnetic radiation may behave as particles or as a wave. As a wave, it is characterized by the speed of light, wavelength, and frequency. Individual particles are known as photons which is described by Planck's relation Energy equals (6.626 x 10^-34 Joules x Seconds) multiplied by the frequency of the wave.
EMR SPECTRUM: Classified into several types according to the frequency of its waves
Radio Waves
Microwaves
Visible Light
Infrared Radiation
Ultraviolet Light
X-Rays
Gamma Rays
The source of all Electromagnetic Radiation is an accelerating charge.
Electromagnetic Waves
The speed of all waves travel at 3X10^8 m/s
Propagation is the way in waves travel
Frequency= the number of waves per unit time
Wavelength is equal to the speed of light divided by its frequency
Dispersion= occurs when a waves velocity is not uniform; it is dependent on frequency
Fluorescence-emission of light from an electromagnetic wave
Reflection= the angle at which a wave is on a surface is the same angle at which is being reflected
Interference occurs when two or more waves come together and create a new wave pattern
Absorption= the way in which energy is taken up by other matter
Scattering occurs when something in a particular medium makes a deviate from a straight trajectory or path
Transparent= ability for light pass through something
Translucent= allows light to diffuse as it passes through
Opaque- the amount of light which is blocked
Phosphorescence= a substance that does not readmit radiation from which it has previously observed
Polarization= the orientation of a waves electric field at a point in its ossillation
Refraction= when the speed of a wave changes direction. Ex. when a wave goes through one substance to anoher
Diffraction occurs when a wave runs into something; the wave begins to bend and move around the object
Representations
Ray= narrow beam of particles
Particle= matter that makes up electromagnetic waves
Wave Packet= short bursts of waves that also travel together
Wave Front = occurs when waves have the same phase
Group members
Catherine Chong Kai Tze 134306,
Lim Ling Xin 134318, Yeo Ying Hui 134341