The change in diffraction pattern of a single slit, when the monochrom...
- When a source of white light is used instead of a monochromatic source, the diffracted image of the slit gets dispersed into constituent colours of white light.
- The central maximum will be white and on either side of the central maximum, there will be coloured fringes.
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The change in diffraction pattern of a single slit, when the monochrom...
When a source of white light is used instead of monochromatic source, the diffracted image of the slit gets dispersed into constituent colours of white light.The central maximum will be white and on either side of the central maximum there will be coloured fringes
The change in diffraction pattern of a single slit, when the monochrom...
Introduction to Diffraction Patterns
Diffraction refers to the bending and spreading of waves when they encounter an obstacle or a slit. The pattern produced by a single slit using monochromatic light typically consists of a central bright fringe, flanked by alternating dark and bright fringes.
Change in Light Source
When the monochromatic light source is replaced with white light, the behavior of the diffraction pattern changes significantly.
Reasons for Dispersion
- White Light Composition: White light is composed of multiple wavelengths (colors) ranging from red to violet.
- Different Wavelengths, Different Angles: Each wavelength will diffract at slightly different angles due to their varying sizes. This causes the light to spread out.
Effect on the Diffraction Pattern
- Dispersion of Colors: Instead of a clear, sharp diffraction pattern, the white light creates a spectrum-like effect. The central bright fringe will still appear, but it will be surrounded by a series of colored fringes rather than just dark and light bands.
- Loss of Clarity: The interplay of different colors results in a less distinct image of the slit, making it appear blurred or wider.
Conclusion
Thus, the correct answer is option 'B': "The diffracted image gets dispersed into constituent colours of white light." This phenomenon illustrates the wave nature of light and the impact of different wavelengths on diffraction patterns.