Sample interview questions: Can you explain the concept of diffraction and its significance in optics?
Sample answer:
Concept of Diffraction
Diffraction is the spreading out of waves as they pass through an aperture or around an obstacle. It occurs due to the wave nature of light and is most pronounced when the wavelength of light is comparable to or larger than the size of the aperture or obstacle.
When light encounters an aperture, the wavefronts bend around the edges of the aperture, resulting in the spreading out of the wave. Similarly, when light encounters an obstacle, the wavefronts diffract around the obstacle, creating a shadow region with fringes of varying intensity.
Significance in Optics
Diffraction plays a crucial role in various optical phenomena and applications:
- Image Formation: Diffraction limits the resolution of optical systems, determining the smallest details that can be resolved.
- Holography: Holograms record diffraction patterns, allowing the reconstruction of 3D images.
- Fiber Optics: Diffraction affects the propagation of light in optical fibers, influencing the design and performance of fiber optic communication systems.
- Spectroscopy: Diffraction gratings are us… Read full answer