± Exercise 7.40 with feedback Part A ou may want to reference(page) section 7.2
ID: 546320 • Letter: #
Question
± Exercise 7.40 with feedback Part A ou may want to reference(page) section 7.2 while completing this problem 105.0 MHz (typical frequency for FM radio broadcasting) Express your answer in meters using four significant figures. Calculate the wavelength of each of the following frequencies of electromagnetic radiation. In Submit My Answers Give Up Part B 1020 kHz (typical frequency for AM radio broadcasting) Express your answer in meters using four significant figures. IIn Submit My Answers Give Up Part C 835.6 MHz (common frequency used for cell phone communication) Express your answer in meters using four significant figures. Submit My Answers Give UpExplanation / Answer
A)
f = 105.0 MHz = 1.050*10^8 Hz
use:
lambda = c/f
=(3.0*10^8 m/s)/(1.05*10^8 s-1)
= 2.857 m
Answer: 2.857 m
B)
f = 1020 KHz = 1.020*10^6 Hz
use:
lambda = c/f
=(3.0*10^8 m/s)/(1.020*10^6 s-1)
= 2.941*10^2 m
Answer: 294.1 m
C)
f = 835.6 MHz = 8.356*10^8 Hz
use:
lambda = c/f
=(3.0*10^8 m/s)/(8.356*10^8 s-1)
= 0.3590 m
Answer: 0.3590 m
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