In the equation dsinθ=mλ for the lines of a diffraction grating, m is:
Correct answer: C. the order of the line
- A. the slit width
- B. the number of slits
- C. the order of the line
- D. the slit separation
Explanation
Explanation: In the equation dsinθ=mλ for a diffraction grating, m represents the order of the line. It indicates the number of the bright fringe (maxima) being considered.
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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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