Question

Using the equation f=c/a to calculate the frequency of ratio waves whose wavelength is 50m. A.0.6hzB.6x10^6hzC.6 megahertz D. Both b and c are correct

Answer 1

D. Both b and c are correct

Step-by-step explanation

In the equation

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

f is the frequency of the wave, c is the speed of light - which is 3 x 10⁸ m/s, and λ is the wavelength. For this wave, the frequency is

`f=(3\cdot10^8m/s)/(50m)=6\cdot10^6hz`

Therefore option B is correct. But remember that the prefix mega adds six zeros to the right of the number, so option C, 6 megahertz is correct too, since:

`6\text{ megahertz}=6,000,000\text{ hertz}=6*10^6\text{ hertz}`

Hence, the answer is D. both B and C are correct.