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A slit of width a is illuminated by whit...

A slit of width a is illuminated by white light.
(a) For what value of a will the first minimum for red light of wavelength `lambda = 650 nm` appear at `theta= 15^(@)`?

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To solve the problem, we need to find the width of the slit (a) for which the first minimum for red light of wavelength \( \lambda = 650 \, \text{nm} \) appears at an angle \( \theta = 15^\circ \). ### Step-by-Step Solution: 1. **Understanding the Condition for Minimum in Single Slit Diffraction**: The condition for the first minimum in single slit diffraction is given by the formula: \[ a \sin \theta = n \lambda ...
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