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How can a bat...

Question

How can a bat tell the size of a flying insect?

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Solution

Dear Student ,
Bats can tell the size of a flying insect by echo location process .
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Q. Horseshoe bats (genus Rhinolophus) emit sounds from their nostrils, then listen to the frequency of the sound reflected from their prey to determine the prey's speed. The horse shoe that gives the bat its name is a depression around the nostrils that acts like a focussing mirror so that the bat emits sound in a narrow beam like a flash light. A Rhinolophus is flying at a speed

v_{b a t}

and emits sound of frequency

f_{b a t}

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v_{s}

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v_{i n s e c t}

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Q. Horseshoe bats (genus Rhinolophus) emit sounds from their nostrils, then listen to the frequency of the sound reflected from their prey to determine the prey's speed. The horse shoe that gives the bat its name is a depression around the nostrils that acts like a focussing mirror so that the bat emits sound in a narrow beam like a flash light. A Rhinolophus is flying at a speed

v_{b a t}

and enits sound of frequency

f_{b a t}

the sound it hears reflected from an insect flying towards it has higher frequency

f_{r e f}

, speed sound is

v_{s}

f_{b a t} = 80.7

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v_{b a t}

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