A medium is said to be dispersive ifA. Light of different wavelength propagate at different speedsB. Light of different wavelengths propagate at same speed but has different frequenciesC. Light is gradually bent rather than sharply refracted at an interface between the medium and airD. Light is never totally internally reflected

A medium is said to be dispersive ifA. Light of different wavelength p

1.	A medium is said to be dispersive ifA. Light of different wavelength propagate at different speedsB. Light of different wavelengths propagate at same speed but has different frequenciesC. Light is gradually bent rather than sharply refracted at an interface between the medium and airD. Light is never totally internally reflected
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