A diffraction grating has 500 lines per mm, its grating element d is equal to:
Correct answer: A. 2 x 10^-6 meter
- A. 2 x 10^-6 meter
- B. 2 x 10^-2 meter
- C. 2 x 10^-2 cm
- D. 2 x 10^-6 cm
Explanation
The explanation is given below.Grating element = 1/N = 1/500 = 0.2 * 10-2 mm = 2 * 10-3 mm = 2 * 10-6 meter.
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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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