Light and Optics
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Transcript of Light and Optics
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Light and Optics
The Electromagnetic SpectrumWave Properties of Light
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The Electromagnetic Spectrum
The energy field created by electricity and magnetism can oscillate and it supports waves that move.
These waves are called electromagnetic waves.
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The Electromagnetic Spectrum Electromagnetic waves
have both an electric part and a magnetic part and the two parts exchange energy back and forth.
A 3-D view of an electromagnetic wave shows the electric and magnetic portions.
The wavelength and amplitude of the waves are labeled λ and A, respectively.
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Waves of the electromagnetic spectrum
Visible light is a small part of the energy range of electromagnetic waves.
The whole range is called the electromagnetic spectrum and visible light is in the middle of it.
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The Electromagnetic Spectrum
The higher the frequency of the light, the higher the energy of the wave.
Since color is related to energy, there is also a direct relation between color, frequency, and wavelength.
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Speed of Light
c = f
Wavelength (m)
Frequency (Hz)
Speed of light3 x 108 m/sec
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Calculate wavelength
Calculate the wavelength in air of blue-green light that has a frequency of 600 × 1012 Hz.