Question

Denver, Colorado, has an oldies station that calls itself "KOOL 105." This means that they broadcast radio waves at a frequency of 105 MHz. Suppose that they decide to describe their station by its wavelength (in meters), instead of by its frequency. What name would they now use?
A. KOOL 0.35  

B. KOOL 2.85

C. KOOL 3.5   

D. KOOL 285

Answer 1

Answer:

The wavelength of radio waves is 2.85 m.

(B) is correct option.

Explanation:

Given that,

Frequency = 105 MHz

We need to calculate the wavelength of radio waves

Using formula of wave velocity

$v = f\times \lambda$

$\lambda=\dfrac{v}{f}$

Where, v = wave speed

f = frequency

$\lambda$ = wavelength

Put the value into the formula

$\lambda=\dfrac{3\times10^{8}}{105\times10^{6}}$

$\lambda=2.85\ m$

Hence, The wavelength of radio waves is 2.85 m.