The velocity of a satellite or a star is determined by the change in frequency of signal (radio wave or light) they emit this phenomena is called _:
Correct answer: B. Dppler's shift
- A. Shift theorem
- B. Dppler's shift
- C. Polarization
- D. None of these
Explanation
Change in frequency of wave (radio wave or light) , this phenomenon is called Dopplers effect. By this velocity of star or satellite can be determined.
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Light is studied through reflection, refraction, dispersion, interference, diffraction and polarization, linking ray behavior with its wave nature. Questions may involve mirrors, lenses, optical instruments, refractive index and image formation, while geometrical optics deals with rays and wave optics explains effects such as interference and diffraction.
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