Question:
A beam of white light splits in to its constituent colours when passed through a glass prism and also when it is passed through a grating, which one of the following statements are true ?
AThe most deviated colour is red in both cases.
BThe most deviated colour is violet in both cases
CRed is most deviated and violet is least deviated in prism spectra
DRed is most deviated and violet is least deviated in grating spectra
Answer:
D. Red is most deviated and violet is least deviated in grating spectra
Explanation:
- Prism Spectrum are formed because of the dispersion of light, the Grating Spectrum is formed because of the diffraction of light.
- The colors of the spectrum produced by a diffraction grating are in reverse order to those of a prism
- In grating spectrum, red color is deviated (diffracted) most and violet least.