The Young’s experiment is first performed with sodium light and then with Neon light of the same intensity.
Which of the following effects will be noticed?

The fringes will disappear

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The fringes will become less distinct

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The fringe width will increase

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The fringe width will decrease

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Solution

The correct option is C The fringe width will increase
$β \propto λ$ ; $λ_{y} < λ_{r e d}$
$β_{r e d} > β_{y e l l o w}$

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