Radio stations use electromagnetic waves for broadcasting. The chart shows different frequencies of waves used by radio stations
. Which radio station has the wave with the longest wavelength?
2 answers:
Answer: radio station W
Explanation:
The wavelength of a radio wave is given by:
where
c is the speed of light
f is the frequency of the wave
From the equation, we see that the wavelength is inversely proportional to the frequency: the higher the frequency, the shorter the wavelength, the lower the frequency, the longer the wavelength.
Therefore, the waves with longest wavelength are the waves with lower frequency: therefore, the waves emitted by radio station W.
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Answer:
The wavelength will be 4 cm, frequency will be 4.66 Hz and wave speed is 18.6 cm/sec
Explanation:
Given:
No. of crest = 13
No. of trough = 15
Time = 3 seconds
Hence, 1 crest or 1 trough =
therefore,
13 C + 15 T =
=
Time given 3 seconds
=
2 cm distance is travelled is time period
Again wave will travel in 1 T = 4 cm
wave speed v =
=
= 18.6 cm/s