When light waves interfere, constructive interference leads to an increase in br

Question

When light waves interfere, constructive interference leads to an increase in brightness and destructive interference to a decrease in brightness. The double-slit experiment uses the interference of coherent waves from two slits to create an interference pattern of alternating bright and dark fringes. Visible light passes through a hole of diameter 150 nm in a sheet of metal and falls on a distant screen. If the metal is heated, making the hole larger, the size of the central bright spot on the screen gets smaller. Light passes through two small parallel slits and leaves an interference pattern on a distant screen. If the two slits are now moved closer to each other, the bright fringes on the screen will also move closer to each other.

Explanation / Answer

3.True (as amplitude increases in constructive and becomes 0 in destructive)

4.TRue.(source is coherent and two slits are used to create path difference)

5.True (the First Radius of dark ring within which bright spot is concentrated will dec with inc in diameter of small hole )

6.True , (because fringe width w decreases with decrease in distance d between slits , w = D(wavelenth)/d )

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