Light is incident normally on a diffraction grating through which first order diffraction is seen at 32o. The second order diffraction will be seen at:
Correct answer: D. None of these
- A. 84o
- B. 48o
- C. 64o
- D. None of these
Explanation
The angle of diffraction, θ, for a diffraction grating is determined by the grating equation: d sin(θ) = nλ, where d is the distance between the grating lines, n is the order of diffraction, and λ is the wavelength. For first order diffraction, n = 1 and θ = 32o. For second order diffraction, n = 2. The relationship between sin(32o) for first order and the required angle for second order can be calculated, but none of the provided options match the correct angle for second order diffraction.
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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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