Question

State the essential condition for diffraction of light to occur

Answer 1

Diffraction is a phenomenon that occurs when light comes across an object and is obstructed.

The essential condition for diffraction to occur is that the wavelength of light should be comparable to that of the size of the object.

It might also occur if the size of the object is less than the wavelength of light.

Answer 2

The essential condition for diffraction of light to occur is that the source of light should be monochromatic.

Explanation:

• Diffraction of light is defined the process in which the bending of light is around corners
• It spreads out and also illuminates in the areas where a shadow is can occur.
• Separate of diffraction from interference is difficult since both occur simultaneously.

• Diffraction of light takes place when the size of the obstacle and  the aperture can be compared with the wavelength of light.

Conditions for diffraction :-

(a)  Light sources should be monochromatic.

(b) Wavelength of the light used should be nearly equal to the size of the obstacle.

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