F11PHYS-1600 - Week 6

.docx
PHYS 1600 Week 6 Unit 6 notes Chapter 3- Section 3-1 Newton disproved belief that white is the fundamental colour of light Refraction: The change in direction as light travels from one medium into another resulting spread of colours is called a spectrum o AFAWEFNEA,MFNM,AENFM,ANFM,AWNFM,WANFEAM,WNFAM,WEF NAM,WNFMWA,NEFM,WANFEM,WANEFM,QN2M,NF,2NWF,NFM,NQM, 4FNM,QF AFAWEFNEA,MFNM,AENFM,ANFM,AWNFM,WANFEAM,WNFAM,WEF NAM,WNFMWA,NEFM,WANFEM,WANEFM,QN2M,NF,2NWF,NFM,NQM, 4FNM,QF AFAWEFNEA,MFNM,AENFM,ANFM,AWNFM,WANFEAM,WNFAM,WEF NAM,WNFMWA,NEFM,WANFEM,WANEFM,QN2M,NF,2NWF,NFM,NQM, 4FNM,QF AFAWEFNEA,MFNM,AENFM,ANFM,AWNFM,WANFEAM,WNFAM,WEF NAM,WNFMWA,NEFM,WANFEM,WANEFM,QN2M,NF,2NWF,NFM,NQM, 4FNM,QF AFAWEFNEA,MFNM,AENFM,ANFM,AWNFM,WANFEAM,WNFAM,WEF NAM,WNFMWA,NEFM,WANFEM,WANEFM,QN2M,NF,2NWF,NFM,NQM, 4FNM,QF AFAWEFNEA,MFNM,AENFM,ANFM,AWNFM,WANFEAM,WNFAM,WEF NAM,WNFMWA,NEFM,WANFEM,WANEFM,QN2M,NF,2NWF,NFM,NQM, 4FNM,QF AFAWEFNEA,MFNM,AENFM,ANFM,AWNFM,WANFEAM,WNFAM,WEF NAM,WNFMWA,NEFM,WANFEM,WANEFM,QN2M,NF,2NWF,NFM,NQM, 4FNM,QF AFAWEFNEA,MFNM,AENFM,ANFM,AWNFM,WANFEAM,WNFAM,WEF NAM,WNFMWA,NEFM,WANFEM,WANEFM,QN2M,NF,2NWF,NFM,NQM, 4FNM,QF AFAWEFNEA,MFNM,AENFM,ANFM,AWNFM,WANFEAM,WNFAM,WEF NAM,WNFMWA,NEFM,WANFEM,WANEFM,QN2M,NF,2NWF,NFM,NQM, 4FNM,QF AFAWEFNEA,MFNM,AENFM,ANFM,AWNFM,WANFEAM,WNFAM,WEF NAM,WNFMWA,NEFM,WANFEM,WANEFM,QN2M,NF,2NWF,NFM,NQM, 4FNM,QF AFAWEFNEA,MFNM,AENFM,ANFM,AWNFM,WANFEAM,WNFAM,WEF NAM,WNFMWA,NEFM,WANFEM,WANEFM,QN2M,NF,2NWF,NFM,NQM, 4FNM,QF AFAWEFNEA,MFNM,AENFM,ANFM,AWNFM,WANFEAM,WNFAM,WEF NAM,WNFMWA,NEFM,WANFEM,WANEFM,QN2M,NF,2NWF,NFM,NQM, 4FNM,QF AFAWEFNEA,MFNM,AENFM,ANFM,AWNFM,WANFEAM,WNFAM,WEF NAM,WNFMWA,NEFM,WANFEM,WANEFM,QN2M,NF,2NWF,NFM,NQM, 4FNM,QF are right Thomas Young demonstrated that light is indeed composed of waves Downloaded free at www.uofgexamnetwork.com
PHYS 1600 Week 6 o When two waves that are both moving up or both moving down meet, they would reinforce each other and create bright regions Light waves are not like water waves light waves do not go through a medium while water waves do James Clerk Maxell demonstrated that electric and magnetic effects should travel through space together in the from of coupled waves that have equal amplitudes this is now called electromagnetic radiation Newton showed that sunlight is composed of all the colours of the rainbow Young, Maxwell and others showed that light travels in waves Different colours are waves with different wavelengths Wavelength: Distance between two successive wave crests Scientists use the unit of length called nanometer to express the tiny distances between wavelength The complete spectrum of colours from the longest wavelength to the shortest is red, orange, yellow, green, blue, violet o The amount of refraction that different colours undergo depends on their wavelengths- The shorter the wavelength, the more light is refracted Section 3-2 Light travels faster than sound First evidence for the finite speed of light came when Ole Romer carefully timed eclipses of Jupiter's moons o Romer found that at opposition, eclipses occur slightly earlier than predicted by Kepler's Laws, and they occur slightly later than predicted when Jupiter is near conjunction The greater the distance to Jupiter, the longer the image takes to reach our eyes from Earth o Romer concluded that it takes 162 min for visible light to traverse the diameter of Earth's orbit (2 AU) Romer's interpretation of the date requires a heliocentric cosmology - that both Earth and Jupiter orbit the Sun Romer's calculation of the speed of light was 25% off because the value for the astronomical unit that existed at the time was very inaccurate Romer proved his point that light travels at a finite speed Maxwell's equations also reveal that light of all wavelengths travels at the same speed in a vacuum the space between the planets and stars is a very good vacuum, despite a few atoms per cubic meter Speed of light appears in equations that describe, among other things, atoms, gravity, electricity, magnetism, distance and time Sec 3-4 Maxwell's equations AFAWEFNEA,MFNM,AENFM,ANFM,AWNFM,WANFEAM,WNFAM,WEFNAM,W NFMWA,NEFM,WANFEM,WANEFM,QN2M,NF,2NWF,NFM,NQM,4FNM,QF Downloaded free at www.uofgexamnetwork.com
PHYS 1600 Week 6 AFAWEFNEA,MFNM,AENFM,ANFM,AWNFM,WANFEAM,WNFAM,WEFNAM,W NFMWA,NEFM,WANFEM,WANEFM,QN2M,NF,2NWF,NFM,NQM,4FNM,QF AFAWEFNEA,MFNM,AENFM,ANFM,AWNFM,WANFEAM,WNFAM,WEFNAM,W NFMWA,NEFM,WANFEM,WANEFM,QN2M,NF,2NWF,NFM,NQM,4FNM,QF AFAWEFNEA,MFNM,AENFM,ANFM,AWNFM,WANFEAM,WNFAM,WEFNAM,W NFMWA,NEFM,WANFEM,WANEFM,QN2M,NF,2NWF,NFM,NQM,4FNM,QF AFAWEFNEA,MFNM,AENFM,ANFM,AWNFM,WANFEAM,WNFAM,WEFNAM,W NFMWA,NEFM,WANFEM,WANEFM,QN2M,NF,2NWF,NFM,NQM,4FNM,QF AFAWEFNEA,MFNM,AENFM,ANFM,AWNFM,WANFEAM,WNFAM,WEFNAM,W NFMWA,NEFM,WANFEM,WANEFM,QN2M,NF,2NWF,NFM,NQM,4FNM,QF AFAWEFNEA,MFNM,AENFM,ANFM,AWNFM,WANFEAM,WNFAM,WEFNAM,W NFMWA,NEFM,WANFEM,WANEFM,QN2M,NF,2NWF,NFM,NQM,4FNM,QF AFAWEFNEA,MFNM,AENFM,ANFM,AWNFM,WANFEAM,WNFAM,WEFNAM,W NFMWA,NEFM,WANFEM,WANEFM,QN2M,NF,2NWF,NFM,NQM,4FNM,QF AFAWEFNEA,MFNM,AENFM,ANFM,AWNFM,WANFEAM,WNFAM,WEFNAM,W NFMWA,NEFM,WANFEM,WANEFM,QN2M,NF,2NWF,NFM,NQM,4FNM,QF AFAWEFNEA,MFNM,AENFM,ANFM,AWNFM,WANFEAM,WNFAM,WEFNAM,W NFMWA,NEFM,WANFEM,WANEFM,QN2M,NF,2NWF,NFM,NQM,4FNM,QF AFAWEFNEA,MFNM,AENFM,ANFM,AWNFM,WANFEAM,WNFAM,WEFNAM,W NFMWA,NEFM,WANFEM,WANEFM,QN2M,NF,2NWF,NFM,NQM,4FNM,QF AFAWEFNEA,MFNM,AENFM,ANFM,AWNFM,WANFEAM,WNFAM,WEFNAM,W NFMWA,NEFM,WANFEM,WANEFM,QN2M,NF,2NWF,NFM,NQM,4FNM,QF AFAWEFNEA,MFNM,AENFM,ANFM,AWNFM,WANFEAM,WNFAM,WEFNAM,W NFMWA,NEFM,WANFEM,WANEFM,QN2M,NF,2NWF,NFM,NQM,4FNM,QF omers have been designing instruments to collect more light than the human eye can gather on its own Two basic types of telescopes: o Those that collect light through lenses are refracting telescopes o Those that collect it from mirrors are reflecting telescopes All modern research telescopes use mirrors to collect light o Reflecting and Refracting telescopes have the same purpose- to collect as many photons as possible so we can better observe the sky Chapter 4 - Sec 1 The amount of electromagnetic radiation that any object emits changes with its temperature Two Principles of Electromagnetic Radiation emitted by objects as their temperature changes: 1. As an object heats up, it gets brighter, emitting more electromagnetic radiation at all wavelengths 2. The brightest colour (most intense wavelength) of the emitted radiation changes with temperature Most objects big enough to be seen with our naked eyes emit electromagnetic radiation as described Downloaded free at www.uofgexamnetwork.com
Page1of 6
Uploaded by DrPelican3646 on coursehero.com