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session.masteringchemistry.com MasteringChemistry session.masteringchemistry.com Resources on of Energy previous | 4 of 13 | next» Part A A radio station's channel, such as 100.7 FM or 92.3 FM, is actually its frequency in megahertz (MHz). where 1 MHz 10 Hz. Calculate the broadcast wavelength of the radio station 93.90 FM Express your answer in meters to four significant figures h, Hints ery rom er of 1m bol in nit of d Submit My Answers Give Up he Part B Green light has a frequency of about 6.00 × 101, Express your answer in joules. i . What is the energy of a photon of green light? ght is al to Hints le light red could ation My Answers Give Up ergy stant Part C

Explanation / Answer

93.9 FM= 93.9*106 Hz

Hz= cycles/sec

Hence frequency= 93.9*106 cycles/sec

speed of light= Frequency* wave length

wave lengt = 3*108 m/s/(93.9*106)=3.19 m= 3.19*109 nm ( 1m= 109 nm)

2. E = h*Frequency , h= plancks' constant= 6.627*10-34 J.s

E= 6.627*10-34*6*1014 joules =3.976*10-19 joules

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