Physical Optics
Electromagnetic spectrum:
A diagram that illustrates all the varieties of electromagnetic
waves based on their relative frequency/wavelengths. Our eyes
observe only a small amount of this spectrum.
Speed of light:
In a vacuum 3x108 m/s. It was first calculated by Olaus Roemer.
Albert Michelson also performed an experiment to refine the value.
Principle of superposition:
When two or more waves occupy the same region of space
simultaneously, the resulting wave disturbance is the sum of
separate waves.
Constructive interference:
Two or more waves superimposing to create a resulting wave that has
a larger amplitude.
Destructive interference:
Two or more waves superimposing to create a resulting wave that has
a smaller amplitude.
Thin film interference:
The principle that creates colors on thin layers of transparent
substances. The light reflecting off the interior of the substance
interferes with light reflecting off the exterior.
Coherent light:
Light wave that are all in phase or in step.
Monochromatic light:
Light waves that possess the same frequency, color, or wavelength.
Diffraction:
The bending of waves around obstacles, corners, or openings.
Polarized light:
Light where the electric field fluctuates in only one direction.
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