Physics

Problem

Visible light of wavelength

500\,\text{nm}

passes through a slit

0.10\,\text{mm}

wide and forms a pattern on a screen

2.0\,\text{m}

away. How many dark fringes are located within

\pm 3.0\,\text{cm}

of the central axis on the screen? a) 8 b) 6 c) 5 d) 7