Exercise 7.42 with feedback Part A 101.2 MHz (typical frequency for FM radio bro

Question

Exercise 7.42 with feedback Part A 101.2 MHz (typical frequency for FM radio broadcasting) Express your answer in joules using four significant figures. You may want to reference ( page ) section 7.2 while completing this problem Calculate the energy of a photon of electromagnetic radiation at each of the following E 101.2.10° Submit My Answers Give Up Incorrect; Try Again; 2 attempts remaining Part B 1035 kHz (typical frequency for AM radio broadcasting) Express your answer in joules using four significant figures. Submit My Answers Give Up Part C 834.6 MHz (common frequency used for cell phone communication) Express your answer in joules using four significant figures. Submit My Answers Give Up

Explanation / Answer

A)

f = 101.2 MHz = 1.012*10^8 Hz

use:

E = h*f

=(6.626*10^-34 J.s)*(1.012*10^8) s-1

= 6.706*10^-26 J

Answer: 6.706*10^-26 J

B)

f = 1035 KHz = 1.035*10^6 Hz

use:

E = h*f

=(6.626*10^-34 J.s)*(1.035*10^6) s-1

= 6.858*10^-28 J

Answer: 6.858*10^-28 J

C)

f = 834.6 MHz = 8.346*10^8 Hz

use:

E = h*f

=(6.626*10^-34 J.s)*(8.346*10^8) s-1

= 5.530*10^-25 J

Answer: 5.530*10^-25 J

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