Answer:
a . Long wavelengths and low frequencies
Explanation:
Low energy waves usually show long wavelengths and a low frequency.
Energy of a wave is dependent on the wavelength and frequency of such a wave.
The wavelength of a wave is the distance between successive crests and troughs of a wave. The frequency of a wave is the number of waves that passes through a particular point per unit of time.
Mathematically, wave energy;
Energy = h x f
where h is the planck's constant
f is the frequency
Also,
Energy = [tex]\frac{h x speed of light}{wavelength}[/tex]
A high energy wave will have a high frequency and a long wavelength.
A low energy wave have a low frequency and a long wavelength
