Young's Double Slit Experiment: Practice Problem & Solution

Solution Explained:

To solve this problem, we apply the core principles of Young's Double Slit Experiment. Understanding the underlying formula is key to arriving at the correct answer below:

Fringe width is given by $\beta = \frac{\lambda D}{d}$. Since the wavelength of blue light is less than that of yellow light ($\lambda_{blue} < \lambda_{yellow}$), the fringe width will decrease.