Question

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
PLEASE HELPPPPPPPPPPPPPP

Answer 1

4.69 x 103 Hz

Step-by-step explanation:

I took the test and got it right :)

Answer 2

Answer:-
`4.69*10^3Hz`

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

`\\u =(c)/(\lambda )`

where,
`\\u` is the symbol for frequency, c is the symbol for speed of light and
`\lambda` is the symbol for wavelength.

Speed of light is
`3.0*10^8(m)/(s)` and the wavelength is given as
`6.40*10^4m` .

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

`\\u =(3.0*10^8((m)/(s)))/(6.40*10^4m)`

`\\u =4.69*10^3Hz`

(since,
`(1)/(s)=Hz` )

So, the frequency of the wave is
`4.69*10^3Hz` .