Question

Why we cannot hear the sound of aeroplane at night

Answer 1

Answer:

Aeroplanes make sound both during the day and night time. ... At night, the temperature of air is less than that of day time. Since, speed of sound depends upon the air temperature, the speed of sound at night is also less. So it is quieter at night time and the intensity of sound depends on speed of sound..........

hope this will help you..