In a two slit experiment with white light, a white fringe is observed o a screen kept behind the slits When the screen in moved away by 0.05 m, this white fringe

Options

A. does not move at all
B. gets displaced from its earlier position
C. become colored
D. disappears

Explanation

To solve the problem regarding the two-slit experiment with white light and the movement of the screen, we can follow these steps:

### Step-by-Step Solution:

1. **Understanding the Setup**: In a two-slit experiment, light passes through two closely spaced slits and creates an interference pattern on a screen. The central maximum (bright fringe) is located directly opposite the midpoint between the two slits.

2. **Identifying the White Fringe**: The white fringe observed on the screen corresponds to the central maximum, where all wavelengths of light (from white light) constructively interfere. This is the brightest point in the interference pattern.

3. **Effect of Moving the Screen**: When the screen is moved away from the slits by a distance of 0.05 m, we need to consider how this affects the position of the fringes. The central maximum will remain at the same angular position, but its linear position on the screen will change.

4. **Conclusion on the Central Maximum**: The central maximum (white fringe) will still be present on the screen, regardless of the distance moved. This is because the central maximum is defined by the condition of constructive interference for all wavelengths, which does not depend on the distance to the screen.

5. **Final Answer**: Therefore, even after moving the screen 0.05 m away, the white fringe (central maximum) will still be observed on the screen.