Answer:
At night we experience quietness more. At this time, sounds of object will be heard more clearer
Answer:
A substance with low ability or no ability to conduct energy.
Such as Rubber,Silicone,Plastic
Answer:
Range of wavelength will be to
Explanation:
We have given range of frequency is 400-560 Hz
Speed of the light
We have to find the range of the wavelength of signal transmitted
Ween know that velocity is given by , here is wavelength and f is frequency
So for 400 Hz frequency wavelength will be
And wavelength for frequency 560 Hz
So range of wavelength will be to