If the screen is moved away from the plane of the slits in Young's double slit experiment, then the:

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Accepted Answer

1. **Formulas:** In Young's Double Slit Experiment, the linear fringe width (separation) is given by $\beta = \frac{\lambda D}{d}$, and the angular fringe width (separation) is given by $	heta = \frac{\lambda}{d}$, where $\lambda$ is the wavelength, $D$ is the distance between the slits and the screen, and $d$ is the distance between the slits.
2. **Analysis:** The problem states that the screen is moved away from the slits, which means the distance $D$ increases.
3. **Effect on Linear Separation:** Since $\beta \propto D$, increasing $D$ will cause the linear separation of the fringes ($\beta$) to increase.
4. **Effect on Angular Separation:** The angular separation $	heta$ depends only on $\lambda$ and $d$. It is independent of the screen distance $D$. Therefore, the angular separation remains constant.
5. **Conclusion:** The correct effect is that the linear separation of the fringes increases.

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