To observe diffraction, the size of the obstacle :

1.	To observe diffraction, the size of the obstacle :
Answer» should be `(lambda)/(2)`, where `lambda` is the wavelength. should be of the ORDER of wavelength has no relation to wavelength. should be much larger than the wavelength. Solution :Condition of diffraction is that size of OBSTACLE is EQUAL to wavelength of light of the SOURCE.

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To observe diffraction, the size of the obstacle :

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