Question

25. In a biprism
experiment, the distance between the second and seventh
the same side of the central bright fringe is 1.215 mm, that between
inrism is 20 cm and the distance between the eyepiece and
fringes on the
the slit and biprism
is 130 cm. I
cm. The magnified and diminished virtual images of the slit for two
nositions of a convex lens inserted between the slit and eyepiece are
and 2 mm, respectively. Find the wavelength of light used.
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Answer 1

experiment wavelength of light it is to be found and the convex lenses are used and it is the experiment of biprism of microscope