A plane transmission grating is an optical device used to separate light into its component wavelengths or colors. It consists of a flat surface with parallel lines or grooves etched or ruled onto it. These lines, known as rulings, act as a series of very closely spaced slits that diffract light as it passes through.
When a beam of light is incident on a plane transmission grating, it is diffracted and dispersed into different angles depending on its wavelength. This dispersion occurs due to the interference of the diffracted waves from the individual slits or rulings.
The spacing between the rulings of a grating, known as the grating constant or period, determines the angular separation of the diffracted orders. The grating equation, given by nλ = d(sinθi + sinθd), relates the wavelength (λ), incident angle (θi), diffracted angle (θd), and the order of diffraction (n) for a plane transmission grating. Here, d is the grating constant.
The higher the order of diffraction, the greater the angular separation between the diffracted wavelengths. This property allows plane transmission gratings to be used for spectroscopy, where they can separate light into its component colors and analyze their intensities.
Plane transmission gratings are widely used in various scientific and technological applications, including spectroscopy, wavelength selection, laser beam shaping, and optical communications. They offer high spectral resolution, efficiency, and flexibility in manipulating light.
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Explanation:
A plane transmission grating is an optical device used to separate light into its component wavelengths or colors. It consists of a flat surface with parallel lines or grooves etched or ruled onto it. These lines, known as rulings, act as a series of very closely spaced slits that diffract light as it passes through.
When a beam of light is incident on a plane transmission grating, it is diffracted and dispersed into different angles depending on its wavelength. This dispersion occurs due to the interference of the diffracted waves from the individual slits or rulings.
The spacing between the rulings of a grating, known as the grating constant or period, determines the angular separation of the diffracted orders. The grating equation, given by nλ = d(sinθi + sinθd), relates the wavelength (λ), incident angle (θi), diffracted angle (θd), and the order of diffraction (n) for a plane transmission grating. Here, d is the grating constant.
The higher the order of diffraction, the greater the angular separation between the diffracted wavelengths. This property allows plane transmission gratings to be used for spectroscopy, where they can separate light into its component colors and analyze their intensities.
Plane transmission gratings are widely used in various scientific and technological applications, including spectroscopy, wavelength selection, laser beam shaping, and optical communications. They offer high spectral resolution, efficiency, and flexibility in manipulating light.
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✨ ANSWER ✨
The plane transmission grating is a plane - sheet of see - through material on which multiple rulings ( opaque ) are made which can be obtained with the help of a fine diamond pointer .
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