A parallel beam of light of wavelength $$\lambda$$ is incident normally on a single slit of width d. Diffraction bands are obtained on a screen placed at a distance D from the slit. The second dark band from the central bright band will be at a distance given by :

A

$$\frac{2 \lambda D}{d}$$

B

$$\lambda d D$$

C

$$\frac{\lambda D}{2d}$$

D

$$\frac{2 \lambda d}{D}$$