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EM Visible light Doppler Waves Terms math $200 $200 $200 $200 $200 $200 $400 $400 $400 $400 $400 $400 $600 $600 $600 $600 $600 $600 $800 $800 $800 $800 $800 $800 $1000 $1000 $1000 $1000 $1000 $1000 $200 Radio waves The lowest frequency of electromagnetic radiation is $400 It is both Is electromagnetic radiation a wave or a particle? $600 Visible and radio Two forms of electromagnetic radiation that penetrate the atmosphere best are: $800 gamma The radiation with the shortest wavelength is $1000 X-rays don’t penetrate the Earth’s atmosphere There are no X-ray telescopes on Earth because $200 red Which color of visible light radiation has the longest wavelength? $400 violet The visible light with the shortest wavelength is $600 visible What type of radiation can be observed well from Earth’s surface? $800 A rainbow, which acts as a prism bending light at different angles depending on the wavelength of the color As white light passes through a raindrop what can occur $1000 We don’t for sure. Since lightmust travel millions of light years, the light we see is millions of years old. How do we know that a star in a distant galaxy is still there? $200 red Objects we are moving away from appear $400 Doppler effect When you hear a siren change pitch as it approaches you this is an example of $600 No shift at all (not blue or red) so it will appear yellow The light from an object moving from right to left will exhibit $800 blue An object moving towards us would appear $1000 You can give its radial velocity, either towards or away from us. What information can be inferred about a star from its Doppler shift? $200 Wavelength The distance between two peaks in a wave is the $400 Velocity or speed Frequency x Wavelength $600 No, EM does not need a medium Is it true that all waves must travel through a medium? $800 Frequency measured in Hz Number of waves passing an observer in a second is called the ________________________ and is measured in ________________________ $1000 Sound travels through a material medium, and can not travel through a vacuum Why can you hear a tree fall in the forest but you can’t hear me slam the space capsule door in space? $200 Wave Does diffraction demonstrate the wave nature of light or the particle nature? $400 amplitude The distance between the top of the crest and the middle of the wave is? $600 Kelvin Temperature scale that places zero at the point where all atomic motion ceases. $800 perpendicular Electrical and magnetic fields of light are __________________ to each other (perpendicular or parallel?) $1000 Doppler effect Motion induced change in observed frequency of a wave is called $200 6 The distance between two crest is 6 cm and the distance from the median to the top of the crest is 4 cm. what is the wavelength? $400 ¼ or .25 Hz A wave has a period of 4 seconds, what is it’s frequency $600 It’s temperature What determines a blackbodies energy peak? $800 The fourth power of its temperature or Temperature 4 (x a constant) The total energy radiated by a blackbody is dependent on (what is the equation) $1000 Star B must be larger. Star A and Star B are the same temperature, but star B is more luminous. What can you tell about these stars?