1. Tardigrade
  2. Question
  3. Physics
  4. Which of the given statements is/are correct for phenomenon of diffraction? I. For diffraction through a single-slit, the wavelength of wave must be comparable to the size of slit. II. The diffraction is very common in sound waves but not so common in light waves. III. Diffraction is only observed in electromagnetic waves.

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Q. Which of the given statements is/are correct for phenomenon of diffraction?
I. For diffraction through a single-slit, the wavelength of wave must be comparable to the size of slit.
II. The diffraction is very common in sound waves but not so common in light waves.
III. Diffraction is only observed in electromagnetic waves.

Wave Optics

Solution:

I. For diffraction pattern, the size of slit should be comparable to the wavelength of wave used.
II. Diffraction phenomenon is commonly observed in our daily routine in case of sound waves (which is a longitudinal wave) because wavelength of sound waves is large $(0.1-1 m )$. However, as wavelength of light waves is extremely small $\left(10^{-6}-10^{-7} m \right)$, we do not observe diffraction of light in daily routine.
III. Diffraction is a wave phenomenon. It is observed in electromagnetic and longitudinal waves as well.