PHYS 131 Lecture Notes - Lecture 2: Electromagnetic Spectrum, Heinrich Hertz, Standing Wave
14 Nov 2017
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Document Summary
Visible light is a tiny portion of a large range of waves known as the electromagnetic spectrum. From an analysis of data that had been obtained from experimentalists such as heinrich. Albert einstein developed an equation relating the energy of light to the frequency of the wave. He later received the nobel prize for this work: e=hf, h is a (cid:272)o(cid:374)sta(cid:374)t of proportio(cid:374)alit(cid:455) k(cid:374)o(cid:449)(cid:374) as pla(cid:374)(cid:272)k"s co(cid:374)sta(cid:374)t. Because n a time graph, time increases to the right, the red wave is ahead of (leads) the blue wave. A complete cycle of a wave corresponds to one rotation of a wheel or 360 degrees. Waves 1 and 2 are in phase because the difference between their crests is zero degrees. Waves 1 and 3 are out of phase because the difference between their crests is 90 degrees or wavelength. Waves 1 and 4 are completely out of phase because their crests is 180 degrees or wavelength.
