Question

Numerical
1. Calculate the frequency in MHz of a radio wave of wavelength 250 m Remember that the speed of
all EM waves in vacuum are 3x10^8m/s.​

Answer 1

Answer:

Explanation:

Speed =wavelength ×frequency

3×10^8=f×250

F=3×10^8/250

F=30/25

F=1.2 MHZ

Hope it is helpfull to all of you

Answer 2

The frequency of radio wave of wavelength 250 m is 1.2 MHz.

Explanation:

Given that,

Wavelength of the radio wave is 250 meters

Speed of all EM waves in vacuum is $c=3\times 10^8\ m/s$

To find,

The frequency of radio wave

Solution,

The speed of an electromagnetic wave is equal to the product of its frequency and wavelength. All electromagnetic waves travel with the speed of light. Let f is its frequency.

$c=\nu \lambda$

$\nu=\dfrac{c}{\lambda}$

$\nu=\dfrac{3\times 10^8}{250}$

$\nu=1200000\ Hz$

Since, $1\ MHz=10^6\ Hz$

$\nu=1.2\ MHz$

Hence, the frequency of radio wave of wavelength 250 m is 1.2 MHz.

Learn more:

Electromagnetic waves

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