In a Young's experiment using sodium light (λ = 589 nm), the slits are 1.2 µm wide. You notice that fringes 4, 8, etc. are missing.

What is the slit separation?

How many fringes appear on the screen?

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## Q1 suppose you discover a type ia supernova in a distantq1. suppose you discover a type ia supernova in a distant galaxy. at maximum brilliance the supernova reaches an |

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