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what is freshnel and fraunhoffer diffraction ? where it is useful ?

what is freshnel and fraunhoffer diffraction ? where it is useful ?
 

Grade:12th pass

10 Answers

BOLLU SRINIVAS
420 Points
7 years ago
Freshnal difraction: both the point source and screen is relatively close to the obstacle then forms  difraction pattern. this situation is described as  near field diffraction or  freshnal diffraction.
Fraunhoffer diffraction: IF the source, obstacle and screen are far enough away  that all lines from source to the obstacle can conside parllal,this pnenomenon is called fraunhoffer diffraction.
We will use fraunhofffer diffrction is usually simpler to analyze.
                             THANK YOU
 
T.kumar
281 Points
7 years ago
Freshnal difraction: both the point source and screen is relatively close to the obstacle then forms  difraction pattern. this situation is described as  near field diffraction or  freshnal diffraction.
Fraunhoffer diffraction: IF the source, obstacle and screen are far enough away  that all lines from source to the obstacle can conside parllal,this pnenomenon is called fraunhoffer diffraction.
We will use fraunhofffer diffrction is usually simpler to analyze.
                             THANK YOU
Gaddam Chethan
317 Points
7 years ago
the diffraction in which the source obstacle and the screen are of enough distance. in this diffraction the waves are considered parallel. this is known as fraunhoffer or field diffraction
N JYOTHEESWAR
342 Points
7 years ago
 
THE  diffraction in which the source obstacle and the screen are of enough distance. in this diffraction the waves are considered parallel. this is known as fraunhoffer or field diffraction
 
salvathshaik
164 Points
7 years ago
fraun hoffer diffraction is known as a abstacle and source and the screen are the close ly placed..and it is also known as the near field differaction...
frehnal diffraction: it is known as  the obsatacle and source and screen are to be far away to the each other and it is also known as  the far field differacton....
Prabhakar ch
577 Points
7 years ago
The diffraction in which the source obstacle and the screen are of enough distance. in this diffraction the waves are considered parallel. this is known as fraunhoffer or field diffraction.
All the best for your bright future
RAMCHANDRARAO
159 Points
7 years ago
in freshnel difraction source and obstacle and the screen are close to each other this is also called near fieald difraction in fraunhoffer diffraction source and obstacle and screen are far apart to each other this also called farfield diffraction
Gowri sankar
292 Points
7 years ago
In freshnel diffraction source and obstacle and the screen are close to each other this is called near field diffraction in fraunhoffer diffraction source and obstacle and screen are far apart to each other this also called farfield diffraction.
raj
383 Points
7 years ago
The diffraction in which the source obstacle and the screen are of enough distance. in this diffraction the waves are considered parallel. this is known as fraunhoffer or field diffraction.
In freshnel diffraction source and obstacle and the screen are close to each other this is called near field diffraction in fraunhoffer diffraction source and obstacle and screen are far apart to each other this also called farfield diffraction.
E.Nandhini ketha
115 Points
5 years ago
In optics, the Fraunhofer diffraction equation is used to model the diffraction of waves when the diffraction pattern is viewed at a long distance

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