Bats chirp at high frequencies that humans cannot hear. They use the echoes to detect small objects, such as insects, as small as one wavelength. If a bat emits a chirp at a frequency of 60.0 kHz and the speed of sound waves in air is 340 m/s, what is the size in millimeters of the smallest insect that the bat can detect? (3 points)

Question

Bats chirp at high frequencies that humans cannot hear. They use the echoes to detect small objects, such as insects, as small as one wavelength. If a bat emits a chirp at a frequency of 60.0 kHz and the speed of sound waves in air is 340 m/s, what is the size in millimeters of the smallest insect that the bat can detect?  (3 points)

anonymous · Answer

well the insect has to be larger than the wave length to be detected right??
so wavelength comes around 56.666 millimeters so the insect has to be equal to or bigger than 56.66 mm 
is my hypothesis correct??? :P