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Questions:

1. What are coherent sources?
2. Name different types of moving coil and moving iron instruments.
3. What are massless particles?
4. Define time dilation and derive the formula for time dilation.
5. Define dispersive power of a grating and obtain an expression for it.
6. Write basic postulates of special theory of relativity and deduce the Lorentz transformation from the postulates.
7. State and prove maximum power transfer theorem.
8. State and prove Norton's theorem. How is Norton's equivalent circuit related with the Thevenin's equivalent circuit?
9. Discuss the phenomenon of interference of light due to thin films and find the conditions of maxima and minima.
10. Explain the phenomenon of diffraction of light. Explain the difference between Fresnel and Fraunhofer diffraction phenomena and distinguish clearly between interference and diffraction of light.