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  4. In free space, an electromagnetic wave of 3 GHz of 3 GHz frequency strikes over the edge of an object of size (λ/100), where λ is the wavelength of the wave in free space. The phenomenon, which happens there will be:

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Q. In free space, an electromagnetic wave of $3\, GHz$ of $3\, GHz$ frequency strikes over the edge of an object of size $\frac{\lambda}{100}$, where $\lambda$ is the wavelength of the wave in free space. The phenomenon, which happens there will be:

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Solution:

$\frac{ a }{\lambda}=\frac{1}{100}$
For reflection size of obstacle must be much larger than wavelength, for diffraction size should be order of wavelength.
Since the object is of size $\frac{\lambda}{100}$, much smaller than wavelength, so scattering will occur.