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State the two postulates of the special theory of relativity

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Q1. State the two postulates of the special theory of relativity.

Q2. Two photons are approaching each other in free space, what is the relative speed of one with respect to other?

Q3. What are de-Broglie's matter waves?

Q4. What is the difference between phase velocity and group velocity?

Q5. Why do you need coherent sources for observing interference pattern? How do you obtain such sources from one light source?

Q6. If the width of grating element is less than twice the wavelength of light which orders of the spectra are visible?

Q7. What is Nicol Prism?

Q8. Distinguish between spontaneous and stimulated emission. Which one is required for laser action?

Q9. What is the principle of operation of a fiber?

Q10. Define holography. How holography is different from photography? Is Earth an inertial or noninertial frame of reference? Justify your answer.

Reference no: EM131067703

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