Question

What is the period of the interference pattern?

Answer 1

Defining. f ( x , y , z ) = exp ( 2 π i x 2 + y 2 + z 2 λ ). we find that. | f ( x − a , y , 0 − c ) + f ( x + a . y , 0 − c ) | 2 = 4 cos [ λ − 1 π ( ( a + x ) 2 + y 2 + ( c − z ) 2 ...