they aimed a radio antenna at the sky and noticed that no matter where they pointed it, they received the same steady microwave signal, which sounded like static. with the help of some princeton physicists, they realized that this wasn't any old static, rather it was very likely to be the spectral remnants of the big bang, the leftover vibrations from that initial explosion of densely packed energy that presumably gave us our universe. for this discovery of the cosmic microwave background, penzias and wilson received the nobel prize in physics in 1978. the connection to music lies in fourier analysis, or more properly, fourier analysis as it is created in the setting of a sphere, which is how we analyze the microwave background. fourier analysis as we've been describing it is about periodic functions, those regularly repeating patterns in time. fourier showed that these could be broken up into sinusoids of different frequencies. on a sphere, rather than get sinusoids, spherical symmetry leads to functions called "spherical harmonics," discovered by the great french mathematician pierr

of a radio wave-- does anyone here know what the speed of a radio signal is that come from the radio antenna's downtown? anyone here know what the speed of those signals are? i'll bet there's people is from that know. in fact, i'll bet that most of the people in this room know, and they say, "wait a minute. isn't that the speed of light? did he said the speed of light?" how many people saying, "yeah, i think it's the speed of light." "no, a speed of light is for light. this is a radio, honey. it's different." no, no, no it's not different. it's just the low frequency. we're gonna learn later on just the low frequency light wave. and it all have the same speed. so the speed 300,000 kilometers per second equals to frequency of the wave times the wavelength. give me your favorite radio station. what's the call letters? kccn. kccnn. what's the number for kccn? - 1420. - what is it? - 1420. - am. what, 1420? am. is it 1420? let's see how long those waves there. the frequency, gang, is guess what? 1420. can we round it off to 1400? - i can't do, too, huh? - it's not. it's gonna-- oh, that's 1,400 ki

flat. >> the lightning takes quite a toll on his equipment. >> what happened was it hit the antenna for am radio and it used to be right here. big antenna going up about that high. you can see some scorch marks on the back of the truck here. >> john is lucky to escape with his life, with unbelievable footage. and a lesson he'll never forget. >> when other people see the video, they're just as amazed as i am, but they're also relieved because they realize you really are safe in your vehicle during a thunderstorm. >> oh, my god! the car was just struck by lightning! >>> coming up, life in this hawaiian town is a dream come true, until it becomes a nightmare. >> there's really nothing you can do to stop a lava flow. >>> it was paradise on earth. until lava destroyed the town. >> lava goes wherever it wants to go. it's very unpredictable. >> and for ten weeks in 1990, veteran videographer nick is at the edge of the disaster capturing the flow on camera. here in hilo on the big island of hawaii, nick has made a living documenting spectacular lava flows. they never cease to amaze him. but this one sto

flat. >> the lightning takes quite a toll on his equipment. >> what happened was it hit the antenna for am radiobe right here. big antenna going up about that high. you can see some scorch marks on the back of the truck here. >> john is lucky to escape with his life, with unbelievable footage. and a lesson he'll never forget. >> when other people see the video, they're just as amazed as i am, but they're also relieved because they realize you really are safe in your vehicle during a thunderstorm. >> oh, my god! the car was just struck by lightni lightning! >>> coming up, life in this hawaiian town is a dream come true, until it becomes a nightmare. >> there's really nothing you can do to stop a lava flow. [ male announcer ] fighting pepperoni heartburn and pepperoni breath? fight both fast with new tums freshers! concentrated relief that goes to work in seconds and freshens breath. new tums freshers. ♪ tum...tum...tum...tum... tums! ♪ [ male announcer ] fast relief, fresh breath, all in a pocket sized pack. who have used androgel 1%, there's big news. presenting androgel 1.62%. both are used to

that flat dish antenna fired very high- frequency radio waves to stop person in his tracks about killingee and injuring him. because the burning sensation the major instantly jump out of the way of the pentagon has been demonstrating how can control an angry crowd manage the u.s. checkpoint. without having to resort to deadly force. >>> we tried a number of ways to be is. >>> the reagan always won. >>> officially called the active denial system it's been tested on humans 11,000 times. once on the assistant secretary of the air force's supervision and. >>> accounted it as the solution to the accidental killing of iraqi civilians by american troops. but the reagan never made its rock. as the program manager at the time the colonel told us the military commanders have a hard time trusting a weapon that doesn't kill. if the system could kill people albee's year to feed reprehension a civilian casualties' is seen as key success but it was right back and his american commanders were for the afghan people would see it as a torture device or a plot to sterilize afghan men. >>> the current progra

the antenna fired very high frequency radio waves to stop a person in his tracks for that killing or injuring him. it caused a burning sensation the mesdames it is simply about the way. eteocles the pentagon has been demonstrating how to control an angry crowd miss the u.s. checkpoint. duckweeds without having to resort to deadly force. we tried a number of ways to be its. the reagan always won. >>> officially called the active denial system is been tested on humans 11,000 times. when sun then assistant secretary of the air force air force to payton. >>> accounted as the solution to the accidental killing of iraqi civilians by american troops. >>> a huge break through a huge game changer. >>> it would save huge numbers of lives. but the reagan never made it to rock as the program manager of the time told us military commanders have a hard time trusting a weapon that doesn't kill. if the system could kill people would be easier to fit he'll lead the weapons have an easier time getting into our system. >>> in 2010 the rate and a shift of afghanistan where prevention of civilian casualt

that flat-dish antenna fired very high frequency radio waves that stopped a person in his tracks without even injuring him. it caused a burning sensation that made you instantly jump out of the way. the pentagon has been demonstrating how it can control an angry crowd menacing a u.s. checkpoint without having to resort to deadly force. we tried a number of ways to beat it. oh! the ray gun always won. ahh! oh! officially called the active denial system, it's been tested on humans, 11,000 times. bring it on! (laughter). >> reporter: once on then assistant secretary of the air force sue peyton. (screaming) (laughter) who touted it as the solution to the accidental killing of iraqi civilians by american troops. >> huge break through. huge game changer. >> reporter: would this save lives in iraq? >> it would save huge numbers of lives. >> reporter: but the ray gun never made it to iraq. as the program manager at the time, colonel kirk hymes told us, military commanders have a hard time trust ago weapon that doesn't kill. if this system could kill people it would be easier to field? >> lethal

antenna. anything that has an aux input. you can stream blue tooth or even an old beat up clock radio would work where you can get music. because the music is on your ipad or iphone these days. how do i get it from one to the other, so kenex. >> will that work on my eight track? >> now we have a tradition of this. you get to pick the next song for the 6:00 hour. >> sounds good. 5:57 right now. >>> still to come on today in the bay, we continue to follow the developing story out of san francisco. a body found there. police say it is a homicide. details coming up in a live report. >>> plus a neighborhood on alert after a woman was almost abducted. >>> if spring break has you running away to tahoe, we're going to get some snow. an additional one to two feet tomorrow. we'll take you through the forecast coming up. >>> and we're also following the slowdowns for 580 and highway 4. highway 4 is tough enough. getting tougher. i'll show you why.