Metal detectors work on the principle of
Correct answer: D. none of these
- A. Doppler effects
- B. organ pipe
- C. beats
- D. none of these
Explanation
Metal detectors work on the principle of electromagnetic induction, which is not represented in the given options. Therefore, the correct option should be (d) none of these
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About Optics
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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