MCQ
A plane wavefront of wavelength `lambda`. is incident on a slit of width a. The angular width of principal maximum is ______.
- A`"a"/(22lambda)`
- B`"a"/lambda`
- ✓`(22lambda)/"a"`
- D`lambda/"a"`
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P(x) = `{{:(x^2/"k"";", x = - 4"," - 3"," - 2"," - 1),(0";", "otherwise"):}`
Then, E(X) = ______