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In Fraunhoffer diffraction by a single s...

In Fraunhoffer diffraction by a single slit, a position where first order minimum is formed by the wavelength of 9000 Å first order maximum is formed due to an unknown wavelength `lamda`' is ....

A

`6000 Å`

B

`4000 Å`

C

`8000 Å`

D

`2000 Å`

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