Question

Help!✨
Two nearby narrow slits are illuminated by a single monochromatic source. Name the pattern obtained on the screen.
One of the slits is now completely covered. What is the name of the pattern now obtained on the screen?
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Answer 1

When two narrow slits are illuminated by a single monochromatic source, the pattern obtained on the screen is interference pattern consisting of alternate bright and dark fringes. When one of the slits is covered completely, no interference occurs. What we obtain is diffraction pattern