VII Atomic Structure and Quantum theory

VII Atomic Structure and Quantum theory - VIII Atomic...

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VIII Atomic Structure and Quantum Theory
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Wave Nature of Light Electromagnetic radiation (light) comes from fluctuating electrical and magnetic fields Movement is propagated as waves Waves are characterized by wavelength ) and frequency( ν ).
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λ = wavelength. Measured in cm,nm,pm,Å Å = angstrom 1 Å = 10 -8 cm ν = frequency measured in hertz, s -1 λν = c = speed of light c = 3.00 x 10 8 m/sec
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Electromagnetic Spectrum Wavelength increases left to right Frequency decreases left to right
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Which of the following has the longest wavelength? A) Microwave B) Infrared C) Ultraviolet D) Visible E) X-ray
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Which of the following has the highest frequency? A) Orange B) Violet C) Blue D) Green E) Yellow
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Continuous Spectra Blending of one wavelength into the next What you see with the electromagnetic spectrum Light from a Prism Diffraction Gratings Light passes through slits. Get Constructive and destructive interference. Evidence of wave nature of light White light passed through a prism shows gradual blending of colors from red to violet
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Quantum Theory At the beginning of the 20th century, three phenomenon were observed that could not be explained by treating light as a wave.
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