What is the frequency of a wave with a wavelength of 6.40 x 104 meters? ?   1.87 x 10−6  hz  2.13 x 10−4  hz  4.69 x 103  hz  1.92 x 1013  hz

4.69 x 103 Hz

Explanation:

I took the test and got it right :)

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Solution:- Wavelength is given and we are asked to calculate the frequency. The equation that correlates frequency with wavelength is:

where, is the symbol for frequency, c is the symbol for speed of light and is the symbol for wavelength.

Speed of light is and the wavelength is given as .

Let's plug in the values in the equation and so the calculations to calculate the frequency:

(since, )

So, the frequency of the wave is .

the answer to this question is 3.

a