Question

If Young?s double slit experiment is done with white light, which of the following statements will be true ?

• A. All the bright fringes wil be coloured
• B. All the bright fringes will be white
• C. The central fringe will be white
• D. No stable interference pattern will be visible

Answer 1

Answer: (C)

The central fringe will be white

Answer 2

Young's double slit experiment with white light which consist wavelength from range $4000\, ?$ to $7000\, ?$
$\because$ At the centre of the screen, the path difference is zero for all wavelengths. The bright fringes of these wavelengths overlap at the centre: Thus, the white fringe at the centre is formed.