AST101H1 Lecture Notes - Lecture 10: Neutrino, Photon, Electromagnetic Radiation
10 Oct 2018
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Putting your hand in front of our eyes: light is absorbed on your hand, this process is what allows us to see things, light is absorbed on the eye, transmission, light going through objects, ex. If the speed is constant increasing the wavelength forces frequency to become smaller: short wavelength = high frequency, long wavelength = low frequency. Electromagnetic spectrum: longer wavelengths than red light: Infrared light, microwaves, and radio waves: shorter wavelengths than blue light, ultraviolet, x-ray, gamma rays. Colour: white is not a colour, a prism splits white light up into a spectrum, a rainbow is sunlight being seen through drops of water in the air. Blackbody radiation: any solid object emits light via thermal radiation . In an ideal situation every object naturally produces its own light that you cannot see through: 2 laws of blackbody rations, 1.
