ASTRON 1144 Study Guide - Midterm Guide: Nuclear Fission, Neutrino, Ideal Gas Law

• School: Ohio State University
• Department: Astronomy
• Course: ASTRON 1144
• Professor: Smita Mathur

Document Summary

Light: the messenger (dual nature: wave & particle) Speed of light: 3x10^8 m/s or 300,000 km/s. Fizeau-foucault experiment how to measure c (speed of light) Up & down=electric fields; left to right= magnetic fields. Wave=periodic changes in the strengths of electric and magnetic fields. All electromagnetic (light) waves travel through a vacuum at the speed of light. This means radio waves, uv waves, visible light rays, etc all travel through a vacuum at the same speed. They do not need a medium to travel through, unlike sound waves. As wavelength increases, frequency decreases; as wavelength decreases, frequency increases. R o y g b i v. Wien"s law the wavelength of maximum emission of a black-body is inversely proportional to its temperature in kelvins. (peak) = (0. 0029)m / t(k) (