Question

when a monochromatic light is incident for a short period of time on a thin barrier having two slits how will a screen placed in front of the slits appear

Answer 1

Interference pattern

Step-by-step explanation:

When a monochromatic light is incident on a thin barrier having two slits, an interference pattern can be seen on the screen placed in front of the slits. The alternate dark and bright fringes appear on the screen.

This can be explained on the basis of wave nature of light. When the monochromatic light passes through the slits, the waves interfere and produce pattern on the screen.

Answer 2

The choices can be found elsewhere and as follows:

A. The screen displays smoothly varying dark and bright bands.
B. The screen is completely illuminated.
C. The screen remains completely dark.
D. The screen is illuminated in apparently random areas of dark and light.
E. The screen displays individual spots of light, organized in bands.

I think the correct answer is option E. The screen displays individual spots of light, organized in bands.

Hope this helps.