CAPE Physics Unit 1 · 2008 (Rest of Region) · Paper 1 · Question Q26

In a Young's two-slit experiment, the separation between the first and fifth bright fringe is 2.5\text{ mm} when the wavelength used is 6.2 \times 10^{-7}\text{ m}. The distance from the slits to the screen is 0.8\text{ m}, then the separation of the two slits is

1. (A)0.2\text{ mm}
2. (B)0.5\text{ mm}
3. (C)0.8\text{ mm}
4. (D)1.0\text{ mm}

This question uses a figure or table from the paper — you'll see it when you practise.