Problem 16.18 Part A What is the frequency of an electromagnetic wave with a wav

Question

Problem 16.18 Part A What is the frequency of an electromagnetic wave with a wavelength of 19 ? Express your answer to two significant figures and include the appropriate units. Part B What would be the wavelength of a sound wave in water with the same frequency as the electromagnetic wave of part A? Express your answer to two significant figures and include the appropriate units. THIS IS MY 4th TIME ASKING THIS QUESTION PLS HELP I WILL SHOW THE ANSWERS THEY HAVE GIVEN ME PART A F=3.10^8 m/s^-1 F= 3*10^8 m^-1/s F=15*10^8 Hz F=1.578*10^7 Hz PART B 1498 m/s (enter your answer using dimensions of distance) 9.547*10^-5 m 10^-4 cm(Use either an integer, decimal number, or scientific notation for the numeric portion of your answer. Do not use calculations or functions) 0.0001 cm 9.5*10^-5 M (Enter your answer using dimensions of distance.)

Explanation / Answer

Solution )

Wavelength = 19cm

We know that

Frequency (F)= c / Wavelength where C =Speed of light=3x10^8m/s

F=3x10^8 /19

F=.1578 X10^8 hz or 1.578x10^7 hz .

Solution part b) Find wavelength of sound in water

We know that

Wavelength = speed of sound / Frequency (Speed of sound in water =1498m/s)

Wavelength = 1498 / 1.578x10^7

Wavelength =.949x10^-4 or or 9.4x10^-5 m

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