Question

calculate the wavelength of radio waves of frequency 10 power 9 hertz the speed of the radio waves is 3 into 10 power 8 metre per seconds​

Answer 1

$\huge\underline\blue{\sf Answer:}$

$\large\red{\boxed{\sf \lambda=3×{10}^{-1}m }}$

$\huge\underline\blue{\sf Solution:}$

$\large\underline\pink{\sf Given: }$

• Frequency (f) = $\sf{{10}^{9}Hz}$

• Speed (v) = $\sf{3×{10}^{8}m/s}$

$\large\underline\pink{\sf To\:Find: }$

• Wavelength ($\sf{\lambda}$)=?

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We know that ,

$\large{♡}$$\large{\boxed{\sf Frequency (f)={\frac{Speed}{\lambda}} }}$

On Putting value :

$\large\implies{\sf {10}^{9}={\frac{3×{10}^{8}}{\lambda}}}$

$\large\implies{\sf \lambda={\frac{3×{10}^{8}}{{10}^{9}}} }$

$\large\implies{\sf 3×{10}^{-1}m }$

$\huge\red{♡}$$\large\red{\boxed{\sf \lambda=3×{10}^{-1}m }}$

Answer 2

$\huge{\underline{\underline{\bf{\pink{Answer:-}}}}}$

_____________

$\color{red}\huge\bold\star\underline\mathcal{Given:-}$

❇Frequency (F)=>10^9hertz

❇Speed(V)=3 x 10^8 m/s

______________________

$\color{green}\huge\bold\star\underline\mathcal{Find:-}$

❇Wavelength(λ)=>?

_____________________

$\color{purple}\huge\bold\star\underline\mathcal{Solution:-}$

As we know,

$\large{\boxed{\sf Wavelength= Speed/frequency}}$

_______Substitute the values in it ;)

$\large{\boxed{\sfλ={ 3x10^8}/{10^9}}}$

$\huge\pink{\boxed{\sf λ=3 x {10}^{-1}m}}$

Thanks❤