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3.00 x 10 m/s (in vacuum) Ø is referred to as a form of ELECTROMAGNETIC RADIATION NOTE: Visible light, X rays, gamma rays, radio waves are all forms of electromagnet ic radiat ion. PROPERTIES OF WAVES l (lambda) = Wavelength Ø is the distance between any two adjacent ident ical points of a wave Ø is measured in units o f length (m, cm, nm, Angstroms) n (nu, new) = Frequency Ø is the number of waves that pass through a point in one unit of time (1 s) Ø is measured in waves/second, or simply 1/second 1
¾¾ = s-1 = 1 Hertz = 1 Hz s 3 Chemistry 101 Chapter 7 Relationship between Wavelength (l), Frequency (n ), and Energy (E) WAVE 1 WAVE 2 l1 , n1, E1 speed of light (c) Long wavelength Low frequency Same speed NOTE: l2 , n2, E2 speed of light (c) (l 1 = 2 l 2) (n1 = 4 Hz) (c) Short wavelength High frequency Same speed (l 2 = ½ l1) (n2 = 8 Hz) (c) Wavelength (l ) and Frequency (n ) are inversely proportional distance Speed = ¾¾¾¾ time For Light Waves : Speed = (distance) 1 ¾¾ time x Speed of Light = Wavelength x c = 4 l x Frequency n Chemistry 101 Chapter 7 DISPERSION OF WHITE LIGHT THROUGH A PRISM · The range of different color lights (different wavelengths) is referred to as a SPECTRUM
· THE SPECTRUM OF WHITE LIGHT IS A CONTINUOUS SPECTRUM Meaning: th...
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