Question

In a biprism experiment the distance between the second and the tenth dark bands on the same side of the central bright is 0.12cm , that between slit and biprism is 20 cm and the distance between eyepiece and the biprism is 80cm . the magnified and the diminished virtual images of the slit for two conjugate positions of a convex lens inserted between the slit and eyepiece are 4.5mm and 2mm respectively . Find the wavelength of light used

Answer 1

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>>In a biprism experiment, the distance be

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In a biprism experiment, the distance between the two images of the slits in the magnified and diminished positions are 2.4 mm and 0.6 mm respectively. The distance between the two virtual images of the slit is

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Solution

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Correct option is B)

When 1) magnified, distance between images, d

1

=2.4

2) dimnished, distance between images, d

2

=0.6

∴ Distance between virtual sources

d=

d

1

d

2

=

1.44

=1.2mm