Question

A person shines a coherent light of a bulb through an object, $A$, which produces a pattern of concentric rings on a screen, $B$. $A$ is most likely

• A. a polarization filter
• B. a single-slit
• C. a multiple-slit diffraction grating
• D. a prism
• E. a sheet with a pinhole

Answer 1

The correct option is E a sheet with a pinhole

A polarization filter will limit the light vectors in a single plane i.e. polarization.

A prism will split the light i.e. dispersion .

A slit system will make a diffraction pattern on screen $B$ , but in this pattern , fringes are straight.

Due to its circular size , a pinhole will produce diffraction pattern on screen $B$ in the forms of concentric rings.