Discussion
Monochromatic ray of light incident on a glass prism does not produce the phenomenon of
Answer: A
Monochromatic light does not produce dispersion.
Dispersion is the splitting of light into its component colours, which happens because the refractive index of glass is different for different wavelengths, so each colour is bent by a different amount. Monochromatic light has a single wavelength, so there is nothing to separate: it emerges from the prism as one coloured beam.
The other effects do not depend on there being several wavelengths. Monochromatic light is still refracted at each face, and therefore deviated from its path. Some of it is reflected at each surface, and it can be totally internally reflected inside the prism if it meets a face at more than the critical angle.
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