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Size of a Wave

Size of a Wave. Rick Graziani Cabrillo College. Speed of Light. Speed of light = 186,000 miles/sec or 300,000,000 meters/sec (approx.). Start here. End here. 1 second. 186,000 miles. Mile: 0. Mile: 186,000. 1 mile 5,280 feet per mile; so 186,000 miles = 982,080,000 feet

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Size of a Wave

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  1. Size of a Wave Rick Graziani Cabrillo College

  2. Speed of Light Speed of light = 186,000 miles/sec or 300,000,000 meters/sec (approx.) Start here End here 1 second 186,000 miles Mile: 0 Mile: 186,000 1 mile • 5,280 feet per mile; so 186,000 miles = 982,080,000 feet • 63,360 inches per mile; so 186,000 miles = 11,784,960,000 inches Rick Graziani graziani@cabrillo.edu

  3. Wavelength http://eosweb.larc.nasa.gov/EDDOCS/wavelength.html • Speed of the wave = Frequency x Wavelength • Wavelength = Speed of the wave / Frequency • Wavelength = Speed of the wave / Frequency • 10.93 feet = 982,080,000 feet / 90,000,000 All About Wavelength Rick Graziani graziani@cabrillo.edu

  4. Speed of Light Speed of light = 186,000 miles/sec Mile: 0, beginning of rope Mile: 186,000, end of rope Length of rope 186,000 miles long 0 seconds After 1/2 second After 1 second 0 second 1 second 1 second • Length of rope 186,000 miles long traveling at the speed of light, 186,000 miles/second • In 1 second we would see the entire length of rope go by. Rick Graziani graziani@cabrillo.edu

  5. Speed of Light – 1 Hz Speed of light = 186,000 miles/sec Mile: 0, beginning of rope Mile: 186,000, end of rope Length of rope 186,000 miles long 186,000 miles 0 second 1 second • So, if 1 Hz is 1 cycle per second, traveling at the speed of light…. • The length of the wave would be 186,000 miles long (300,000,000 meters). Rick Graziani graziani@cabrillo.edu

  6. Speed of Light – 2 Hz Speed of light = 186,000 miles/sec Mile: 0, beginning of rope Mile: 186,000, end of rope Length of rope 186,000 miles long 93,000 miles 0 second 1 second • 2 Hz is 2 cycles per second, traveling at the speed of light…. • The length of each wave would be 186,000/2 or 93,000 miles long (150,000,000 meters). Rick Graziani graziani@cabrillo.edu

  7. Speed of Light – Let’s do inches 11,784,960,000 inches 6,000,000,000 inches • 11,784,960,000 inches in a mile • 1 Hz wave = 11,784,960,000 inches (11 billion inches) • 2 Hz wave = 11,784,960,000 / 2 = 6 billion inches (give or take) • What would a wave the size of 11 GHz wave be? Rick Graziani graziani@cabrillo.edu

  8. Speed of Light – Lets do inches Mile: 186,000, end of rope Length of rope 186,000 miles long Mile: 0, beginning of rope Length of rope 11.8 billion inches long 1 2 11 billion … 1 inch 0 second 1 second • What would a wave the size of 11 GHz wave be? • Size of the rope divided by the number of pieces = size of each piece • About 1 inch! (11,784,960,000 inches / 11,000,000,000 pieces or cycles or Hz) • Same as slicing up the 186,000 mile rope into 11 billion equal pieces. • Each piece is 1 inch, 11 billion pieces equal 11 billion inches, the size of our rope traveling at 186,000 miles per second. Rick Graziani graziani@cabrillo.edu

  9. Speed of Light – Lets do inches Mile: 186,000, end of rope Length of rope 186,000 miles long Mile: 0, beginning of rope Length of rope 11.8 billion inches long 1 2 1 billion … 11.8 inches 0 second 1 second • What would a wave the size of 1 GHz wave be? • 11 inches! (Actually, 11.8 inches because we rounded off values.) (approx.: 11,784,960,000 inches / 1,000,000,000) • Same as slicing up the 186,000 mile rope into 1 billion equal pieces. • Each piece is 11 inches, 1 billion pieces equal 11 billion inches, the size of our rope traveling at 186,000 miles per second. Rick Graziani graziani@cabrillo.edu

  10. RADM Grace Hopper • Grace Hopper, “Mother of Cobol” • The size of a nanosecond, 11.8 inches • The distance the speed of light travels in a billionth of a second. Rick Graziani graziani@cabrillo.edu

  11. Size of a 2.4 GHz WLAN wave Mile: 186,000, end of rope Length of rope 186,000 miles long Mile: 0, beginning of rope Length of rope 11.8 billion inches long 1 2 2.4 billion … 4.8 inches 0 second 1 second • Same as slicing up the 186,000 mile rope into 2.4 billion equal pieces. • Each piece is 4.8 inches or 12 cm (.12 meters) (approx.: 11,784,960,000 inches / 2,400,000,000) • 2.4 billion pieces equal 11 billion inches, the size of our rope traveling at 186,000 miles per second. Rick Graziani graziani@cabrillo.edu

  12. Size of a 5.8 GHz WLAN wave Mile: 186,000, end of rope Length of rope 186,000 miles long Mile: 0, beginning of rope Length of rope 11.8 billion inches long 1 2 5.8 billion … 2 inches 0 second 1 second • Same as slicing up the 186,000 mile rope into 5.8 billion equal pieces. • Each piece is 2 inches or 5 cm (.05 meters) (approx.: 11,784,960,000 inches / 5,800,000,000) • 5.8 billion pieces equal 11 billion inches, the size of our rope traveling at 186,000 miles per second. Rick Graziani graziani@cabrillo.edu

  13. End of Size of a Wave Rick Graziani Cabrillo College

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