Question:

To observe diffraction, the size of the obstacle

Updated On: Feb 23, 2024
  • has no relation to wavelength.
  • should be $\lambda / 2,$ where $\lambda$ is the wavelength
  • should be much larger than the wavelength
  • should be of the order of wavelength
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The Correct Option is D

Solution and Explanation

To observed diffraction, the size of the obstacle should be of the order of wavelength. i.e. $\lambda=d$.
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Concepts Used:

Single Slit Diffraction

In the single-slit diffraction experiment, we can examine the bending phenomenon of light or diffraction that causes light from a coherent source to hinder itself and produce an extraordinary pattern on the screen called the diffraction pattern.

Single Slit Diffraction
The path difference exhibited by the top two rays

 

 

 

Read More: Difference Between Diffraction and Interference

Central Maximum

Central Maximum