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# What is the frequency of a radio wave with a wavelength of 3 m?

Updated: 8/11/2023

Wiki User

11y ago

It only tells you how to write it once you find it.

Onie Koch

Lvl 10
1y ago
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## Resultant velocity is calculated using which two math functions

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Wiki User

11y ago

Frequency = speed/wavelength = 300,000,000/3 = 100 MHz.

Wiki User

13y ago

The equation for frequency is f=v/λ where f= Frequency,
v= Phase Velocity or in basic physics just velocity,
λ= Wavelength

But there is a special case where if electromagnetic waves are in a vacuum then v=c where C= The speed of Light

so you have 3x10-4 = c/λ or λ=c/3x10-4
so if you sub in the speed of light for c=299,792,458m/s then you get

λ= 999308193333.333333333m
or in appropriate significant figure notation
λ= 9x1011m

Wiki User

13y ago

Wavelength = (speed) divided by (frequency)

Speed of light, radio, infrared, x-rays, etc. = 300,000,000 meters/sec

Wavelength = (300,000,000 / 3,000,000) = 100 meters.

You can't see that wavelength, and it's not usually described as "light".
It's in the region of the electromagnetic spectrum known as "radio".

Wiki User

11y ago

Because the speed is in m/s, you need to convert the frequency from megaherz to hz, which is /s.

Convert MHz to Hz

60 MHz x 1 000 000 Hz/MHz = 60 000 000Hz = 6 x 107Hz

Known:

f = 6 x 107Hz

c = 3 x 108 m/s = speed of light in a vacuum

Unknown: wavelength, λ

Equation:

c = ƒ•λ, where f if frequency in Hz, λ is the wavelength in meters, and c is the speed of light in a vacuum in m/s.

Solution:

λ = c/ƒ = (3 x 108 m/s) / (6 x 107Hz) = 5 m

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Summary, for shorter attention-spans:

Wavelength = (speed)/(frequency) = (3 x 108)/(60 x 106)= 5 meters

math

Lvl 3
2y ago

100 MHz (1x10^8 HZ)

apex

Wiki User

6y ago

The frequency is 99,931 MHz.