In a Fresnel’s diffraction arrangement, the screen is at a distance of 2 meter from a circular aperture. It is found that for light of wavelengths lambda_(1)and lambda_(2)the radius of 4 thzone for lambda_(1) coincides with the radius of 5th zone for lambda_(2). Then the ratio lambda_(1) : lambda_(2) is

In a Fresnel’s diffraction arrangement, the screen is at a distance

1.	In a Fresnel’s diffraction arrangement, the screen is at a distance of 2 meter from a circular aperture. It is found that for light of wavelengths lambda_(1)and lambda_(2)the radius of 4 thzone for lambda_(1) coincides with the radius of 5th zone for lambda_(2). Then the ratio lambda_(1) : lambda_(2) is
Answer» `SQRT(4//5)` `sqrt(5//4)` `5//4` `4//5` ANSWER :C

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