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Wave Nature of Light

LC Physics

TermDefinition
Spectrometer An instrument used to examine spectra and measure the wavelength of light.
Monochromatic Light Light composed of only one wavelength.
Diffraction Grating Transparent medium with a large number of engraved parallel lines.
The Grating Constant The distance between two adjacent slits on a diffraction grating. d = 1/x where x is the number of lines per mm.
Zero Order Brightest dot/line
Stress Polarisation When polarised light is passed through a stressed piece of perspex and viewed through another Polaroid an interference pattern is formed.
Dispersion Splitting up of light into a spectrum composed of different wavelengths present.
Primary Colours Red, green and blue.
Secondary Colours When two primary colours are mixed together. Yellow, cyan and magenta are the secondary colours. Green + Red = Yellow Green + Blue = Cyan Blue + REd = Magenta
Complementary Colours When a primary and the opposite secondary colour mix to make white light. Red + Cyan Blue + Yellow Green + Magenta
UV Light Ultra Violet light with a wavelength between 0.4 micro metres and 5 nano metres. Properties: 1. Causes certain substances to flouresce. 2. Effects photographic plates 3. Causes sunburn 4. Can cause the photoelectric effect.
Infra-red Light Light with a wavelength between 0.7 x 10^-6 m and 1 mm. Properties: 1. Causes substances to heat up 2. Effects photographic plate
Created by: mduffy13
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