Two sources of light of wavelength 700 nm are 9 m away from a pinhole of diameter 1.2 mm. How far apart must the sources be for their diffraction patterns to be resolved by Rayleigh's criterion

The distance is  

Explanation:

From the question we are told that

    The wavelength of  the  light source is  

     The distance from a pin hole is  

       The  diameter of the pin  hole is  

Generally the distance which the light source need to be in order for their diffraction patterns to be resolved by Rayleigh's criterion is

mathematically represented as

substituting values

as a general rule, scissors have blades less than 6 in (15 cm) long and usually have handles with finger holes of the same size. shears have blades scissors used to cut hair or fabric must be much sharper.

it is very well related to a lot of things but with my limited knowledge i can confidently say that the answer is space.