#### Fraunhofer diffraction-single slit, double slit, diffraction grating, resolving power; Diffraction by a circular aperture and the Airy pattern;

Questions:

**Q 1. **Can D1 and D2 lines of sodium light be resolved in second-order spectrum if the number of lines in the given grating is 450? Explain. $\lambda_{D1}=5890 A^0$ and $\lambda_{D1}=5890 A^0$. **[10 marks]**

**Q 2. ** Discuss the phenomena of Fraunhofer diffraction at single slit and how that the intensities of successive maxima are nearly in the ratio of $1:\frac4{9\pi^2}:\frac4{25\pi^2}:\frac4{49\pi^2}$** .[20 marks]
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Video Solution at 11 pm