How do the spacings of the three planes ( 100), ( 101) and ( 111) of simple cubic lattice vary ?

How do the spacings of the three planes ( 100), ( 101) and ( 111) of s

1.	How do the spacings of the three planes ( 100), ( 101) and ( 111) of simple cubic lattice vary ?
Answer» SOLUTION :`1 : 1// SQRT2 : 1 // SQRT3`