Light of wavelength $\lambda$is normally incident on some plane optical device.The intensity pattern shown is observed on a distant screen ($\theta$ is the angle measured to the normal of the device).The device could be:
A)a single slit of width W
B)a single slit of width 2W
C)two narrow slits with separation W
D)two narrow slits with separation 2W
E)a diffraction grating with slit separation W

Question

Light of wavelength $\lambda$is normally incident on some plane optical device.The intensity pattern shown is observed on a distant screen ($\theta$ is the angle measured to the normal of the device).The device could be: 
A)a single slit of width W 
B)a single slit of width 2W 
C)two narrow slits with separation W 
D)two narrow slits with separation 2W 
E)a diffraction grating with slit separation W

Quizplus · Accepted Answer

The Answer of Light of wavelength $\lambda$is normally incident on some plane optical device.The intensity pattern shown is observed on a distant screen ($\theta$ is the angle measured to the normal of the device).The device could be: 
A)a single slit of width W 
B)a single slit of width 2W 
C)two narrow slits with separation W 
D)two narrow slits with separation 2W 
E)a diffraction grating with slit separation W

Light of Wavelength λ\lambdaλ Is Normally Incident on Some Plane Optical Device

Light of Wavelength $\lambda$ Is Normally Incident on Some Plane Optical Device