Question: Can a grating be used to study non-visible wavelengths?Īnswer: Yes, gratings can be designed for different parts of the electromagnetic spectrum, including ultraviolet and infrared.ġ6. Question: Why might higher orders of diffraction overlap with one another?Īnswer: For different wavelengths, higher orders can diffract at angles that match lower orders of other wavelengths, causing overlapping spectra.ġ5. Question: How does a grating produce a spectrum?Īnswer: When white light interacts with a grating, each wavelength diffracts at a unique angle, spreading them out spatially to produce a spectrum.ġ4. Higher groove densities generally lead to higher resolutions.ġ3. Question: Why is a grating’s groove density (lines per mm) significant?Īnswer: Groove density determines the grating’s dispersion and resolution. Question: How is a transmission grating different from a reflection grating?Īnswer: In a transmission grating, light passes through the grating material, whereas in a reflection grating, light is reflected off the grating surface.Īnswer: Blazed gratings are reflection gratings where the grooves are angled (or blazed) to direct most of the energy into a specific diffraction order, optimizing efficiency.ġ2. Question: Can diffraction gratings be used with other types of waves besides light?Īnswer: Yes, they can be used with any wave phenomenon, including sound waves and X-rays.ġ0. It increases with more lines and higher diffraction orders.ĩ. Question: What is meant by the resolving power of a grating?Īnswer: Resolving power is the grating’s ability to distinguish between two closely spaced wavelengths. See also Mass and weight – problems and solutionsĨ. Question: How does increasing the number of slits (or lines) in a diffraction grating affect the pattern?Īnswer: Increasing the number of slits sharpens the diffraction maxima, enhancing the resolution of the spectrum. Question: Why do different colors/wavelengths diffract at different angles?Īnswer: Because the diffraction angle ( � θ) is directly proportional to the wavelength ( � λ), longer wavelengths (like red) diffract more than shorter ones (like blue).ħ. Question: How is the diffraction angle related to the wavelength of light?Īnswer: The relationship is given by the grating equation: ��=�sin� mλ = d sin θ, where � m is the order of diffraction, � λ is the wavelength, � d is the grating spacing, and � θ is the diffraction angle.Ħ. Question: Why are the spacings between grating lines crucial?Īnswer: The spacings determine the angles at which different wavelengths of light are diffracted, thereby affecting the resolution and clarity of the spectrum produced.Ĥ. Question: How does diffraction grating differ from a double slit?Īnswer: While both cause diffraction, a grating has many more slits (or lines) per unit length, producing more diffracted beams and clearer spectral separation.ģ. Question: What is a diffraction grating?Īnswer: A diffraction grating is an optical component with a periodic structure, which splits and diffracts light into several beams traveling in different directions.Ģ. Determine the number of slits per centimeter.Ģ0 conceptual questions and answers about diffraction grating:ġ. A monochromatic light with wavelength of 500 nm (1 nm = 10 -9 m) strikes a grating and produces the second-order bright line at an 30° angle. Determine the number of slits per centimeter.ĥ. A monochromatic light with wavelength of 500 nm (1 nano = 10 -9) strikes a grating and produces the fourth-order bright line at an 30° angle. D istance between slit and the viewing screen is 2 m, d istance between the third -order fringe and the central fringe is 150 cm. A monochromatic light with wavelength of 5.10 -7 m strikes a grating. Determine the angular positions of the second-order bright line. A monochromatic light with a wavelength of 2.5×10 -7 m strikes a grating containing 10,000 slits/cm. What is the wavelength of the light used? (1 Å = 10 -10 m) A grating containing 4000 slits per centimeter is illuminated with a monochromatic light and produces the second-order bright line at a 30° angle. Diffraction grating – problems and solutionsġ.
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