Prism Spectra
1.) Prism spectra are obtained by the phenomena of dispersion of light.
2.) Prism spectra have only one order.
3.) A prism spectrum is of bright intensity.
4.) In prism spectra, spectral colors overlap each other.
5.) Red color is dispersed least whereas violet color disperses the maximum.
6.) Prism spectrum depends upon the material of prism.
7.) The prism spectral lines are curved.
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Grating Spectra
1.) Grating spectra are obtained by the phenomena of diffraction of light.
2.) Grating spectra has more than one order.
3.) Grating spectra is of less intensity.
4.) In grating spectra, there is no overlapping of color.
5.) Red color diffracts the maximum whereas violet color diffracts the least.
6.) Grating spectra are independent of the material of grating.
7.) The grating spectral lines are almost straight.
Angle of Acceptance → If incident angle of light on the core for which the incident angle on the core-cladding interface equals the critical angle then incident angle of light on the core is called the "Angle of Acceptance. Transmission of light when the incident angle is equal to the acceptance angle If the incident angle is greater than the acceptance angle i.e. $\theta_{i}>\theta_{0}$ then the angle of incidence on the core-cladding interface will be less than the critical angle due to which part of the incident light is transmitted into cladding as shown in the figure below Transmission of light when the incident angle is greater than the acceptance angle If the incident angle is less than the acceptance angle i.e. $\theta_{i}<\theta_{0}$ then the angle of incidence on the core-cladding interface will be greater than the critical angle for which total internal reflection takes place inside the core. As shown in the figure below Transmission of lig
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