The reason there are two slits, rather than one, in a Young's experiment is:
A)to increase the intensity
B)one slit is for frequency, the other for wavelength
C)to create a path length difference
D)one slit is for fields, the other is for fields
E)two slits in parallel offer less resistance

Question

The reason there are two slits, rather than one, in a Young's experiment is:
A)to increase the intensity 
B)one slit is for frequency, the other for wavelength 
C)to create a path length difference 
D)one slit is for fields, the other is for fields 
E)two slits in parallel offer less resistance

Quizplus · Accepted Answer

The purpose of having two slits is to create a path length difference between them, which is necessary to produce an interference pattern. When light passes through the slits, it diffracts and spreads out, creating two coherent wave fronts that interfere with each other. The path length difference between these wave fronts determines the constructive and destructive interference pattern that is observed on the screen.

The Reason There Are Two Slits, Rather Than One, in a Young's