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For Fraunhofer diffraction to occur...

For Fraunhofer diffraction to occur

A

light source should be at infinity.

B

both source and screen should be at infinity.

C

only the source should be at finite distance

D

both source and screen should be at finite distance

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The correct Answer is:
B
NA
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TARGET PUBLICATION-INTERFERENCE AND DIFFRACTION-COMPETITIVE THINKING
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  8. A slit of width a is illuminated by white light. For red light (lambda...

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  13. In Fraunhofer diffraction pattern, slit width is 0.2 mm and screen ...

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  14. A plane wavefront (lambda=6xx10^-7m) falls on a slit 0.4m wide. A conv...

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  15. The first minimum of a single slit diffraction pattern is observed at ...

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  16. Light of wavelength 589.3nm is incident normally on the slit of width ...

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  17. Light of wavelength lamda is incident on a slit of width d. the result...

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