The figure shows a double slit experiment where $P$ and $Q$ are the slits. The path lengths $PX$ and $QX$ are $n\lambda$ and $(n + 2)\lambda$ respectively, where $n$ is a whole number and $\lambda$ is the wavelength. Taking the central fringe as zero, what is formed at $X$

Question

Dr. Abubacker · Accepted Answer

(c) For brightness, path difference $= n\lambda = 2\lambda$
So second is bright

Q. The figure shows a double slit experiment where $P$ and $Q$ are the slits. The path lengths $PX$ and $QX$ are $n\lambda$ and $(n + 2)\lambda$ respectively, where $n$ is a whole number and $\lambda$ is the wavelength. Taking the central fringe as zero, what is formed at $X$

Explanation

Reviewed by Dr. Abubacker

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