The wavelengths of radio waves are much _______________ than the wavelength of microwaves. therefore, radio waves carry much ___
2 answers:
Answer:
The wavelengths of radio waves are much longer than the wavelength of microwaves. therefore, radio waves carry much lower energy than a microwave.
Explanation:
The wavelength of radio waves is longer than the wavelength of microwaves.
Using the equation that relates energy and wavelength:
where h and c are constants (h is Planck's constant and c the constant of the velocity of light)
And is the wavelength.
What this equation tells us is that the energy is inversely proportional to the wavelength. The larger the wavelength, the lower the energy that the wave carries.
So, since the wavelength of radio waves is much longer, its energy is much lower than the energy of microwaves.
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(a) 0.96 m/s
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The wavelength instead is just the distance between two consecutive crests, so
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(b) 0.265 m
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d = 0.53 m
The amplitude is just the maximum displacement of the wave from the equilibrium position, so it is equal to half of this distance. So, the amplitude is
(c) Amplitude: 0.15 m, wave speed: same as before
In this case, the amplitude of the wave would be lower. In fact,
d = 0.30 m
So the amplitude would be
Instead, the wave speed would not change, since neither the frequency nor the wavelength of the wave have changed.