How practical double slit experiment differ from the young double slit experiment given in a basic physics text book? Will there be any difference in the appearance of fringes ? An elaborate comparison between real vs theoretical observations will be appreciated.

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    $\begingroup$ I charge US$ 400/hr. $\endgroup$
    – my2cts
    Commented Jun 3 at 9:26
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    $\begingroup$ Descriptions of the original double slit experiment performed by Young given in a basic physics text book are usually incorrect as Young used two pinholes and the resulting fringes were hyperbolae. $\endgroup$
    – Farcher
    Commented Jun 3 at 22:27

1 Answer 1


Have you read the Wikipedia article on Young's double-slit experiment ?

One key difference from modern versions is that Young used sunlight, which is a mix of light of different wavelengths, whereas the modern version typically uses light that is as close to a single wavelength as possible (e.g. from a laser pointer) - this makes the interference pattern sharper and thus easier to observe.


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