VHF, or very high frequency, refers to radio frequency electromagnetic waves in the range 30 to 300 MHz. In the U.S., television stations broadcast channels 2 through 13 in the VHF range betwe 54.0 MHz and 216 MHz, with ranges 72.0 to 76.0 MHz and 88.0 to 174 MHz not utilized for TV broadcasting. Each channel has a frequency width of 6.00 MHz. The table below gives the lower and upper frequency of each channel. Channel 2 3 4 5 6 7 8 9 10 11 12 13 Lower edge (MHz) Upper edge (MHz) 54 60 66 76 82 174 180 186 192 198 204 210 m m m 60 m 66 72 m 82 88 180 186 192 (a) Calculate the broadcast wavelength range for channel 2. (Enter your answers from smallest to largest, in m.) smallest value largest value 198 204 210 (b) Calculate the broadcast wavelength range for channel 5. (Enter your answers from smallest to largest, in m.). smallest value largest value 216 (c) Calculate the broadcast wavelength range for channel 6. (Enter your answers from smallest to largest, in m.) smallest value

Electromagnetic radiation having a 14.5 µm wavelength is classified as infrared radiation. What is its frequency (in Hz)?

VHF, or very high frequency, refers to radio frequency electromagnetic waves in the range 30 to 300 MHz. In the U.S., television stations broadcast channels 2 through 13 in the VHF range between 54.0 MHz and 216 MHz, with ranges 72.0 to 76.0 MHz and 88.0 to 174 MHz not utilized for TV broadcasting. Each channel has a frequency width of 6.00 MHz. The table below gives the lower and upper frequency of each channel. Channel Lower edge (MHz) Upper edge (MHz) 2 3 4 5 6 7 8 9 10 11 12 13 54 60 66 76 82 174 180 186 192 198 204 210 m m m m 60 66 m 72 m 82 88 180 186 (a) Calculate the broadcast wavelength range for channel 2. (Enter your answers from smallest to largest, in m.) smallest value largest value 192 198 204 (b) Calculate the broadcast wavelength range for channel 3. (Enter your answers from smallest to largest, in m.) smallest value largest value 210 216 (c) Calculate the broadcast wavelength range for channel 5. (Enter your answers from smallest to largest, in m.) smallest value…

consider a bright star in our sky. assume its distance from earth is 38.3 light-year (ly) and its power output is 4.00 * 10^28 W. about 100 times that of the sun. one light-year is the distance traveled by light through a vacuum in one year. a. find the intensity of the starlight at the earth. b. find the power of the starlight at the earth intercepts ( the radius of earth is 6.38 * 10^6 m .)