Bats Can Detect Small Objects Such as Insects That Are

Multiple Choice

Bats can detect small objects such as insects that are of a size approximately that of one wavelength.If bats emit a chirp at a frequency of 50 kHz,and the speed of sound waves in air is 330 m/s,what is the smallest size insect they can detect?

A) 1.5 mm
B) 3.7 mm
C) 5.5 mm
D) 6.6 mm