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Mechanical Properties Of Fluids

Question
CBSEENPH11018950
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Waves of intensity level 27.96db and 30.88db from two coherent sources interfere. A detector is moved along the line perpendicular to right bisector of two sources. Find the intensity at the point where constructive and destructive inference takes place. Take antilog 2.796 = 625, antilog 3.088 = 1225 and threshold of hearing 1pW/m2.

Solution
The intensity of wave from the first source is, 
straight I subscript 1 space equals space straight I subscript straight o space Antilog space open parentheses straight L subscript 1 over 10 close parentheses space space space space equals space straight I subscript straight o space Antilog space open parentheses fraction numerator 27.96 over denominator 10 end fraction close parentheses space space space equals space 625 space straight I subscript straight o space The space intensity space of space wave space from space second space source space is comma space straight I subscript 2 space equals space straight I subscript straight o space Antilog space open parentheses straight L subscript 2 over 10 close parentheses space space space space space equals space straight I subscript straight o space Antilog space open parentheses fraction numerator 30.88 over denominator 10 end fraction close parentheses space space space space space space equals space 1225 space straight I subscript straight o space At space constructive space interference comma space straight I subscript max space equals open parentheses square root of straight I subscript 2 end root space plus space square root of straight I subscript 1 end root close parentheses squared space space space space space space space space space space equals space open parentheses square root of 1225 space straight I subscript straight o end root space plus space square root of 625 space straight I subscript straight o end root close parentheses squared space space space space space space space space space space equals space 60 space straight I subscript straight o space equals space 60 space cross times space 10 to the power of negative 12 end exponent space straight W divided by straight m squared space At space destructive space interference comma space straight I subscript min space equals open parentheses square root of straight I subscript 2 end root space minus space square root of straight I subscript 1 end root close parentheses squared space space space space space space space space equals space open parentheses square root of 1225 space straight I subscript straight o end root space minus space square root of 625 space straight I subscript straight o end root close parentheses squared space space space space space space space equals space 10 space straight I subscript straight o space equals space 10 space cross times space 10 to the power of negative 12 end exponent space straight W divided by straight m squared

Some More Questions From Mechanical Properties of Fluids Chapter

What is wave?

Is it logical to say that wave motion is a process of propagation of mass?

What is common property of all types of waves?

What are different types of wave motions?

Define transverse wave motion.

Define longitudinal wave motion.

Which of the two waves - elastic waves or electromagnetic waves does need any material media for its propagation?

What is sound?

How sound is produced?

Can sound travel in vacuum?

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