Physics

Problem

In a Young’s double-slit arrangement, the distance between the 3rd bright fringe and the 5th dark fringe on the same side of the centre is measured to be

1.8\,\text{mm}

. The slits are

0.30\,\text{mm}

apart and the screen is

1.2\,\text{m}

away. Estimate the wavelength of the light used. a)

200\,\text{nm}

450\,\text{nm}

300\,\text{nm}

225\,\text{nm}

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