# NEET Physics Ray Optics and Optical Instruments Questions Solved

A thin prism of angle $15°$ made of glass of refractive index ${\mathrm{\mu }}_{1}=1.5$ is combined with another prism of glass of refractive index ${\mathrm{\mu }}_{2}=1.75.$ The combination of the prism produces dispersion without deviation. The angle of the second prism should be

(a) $7°$                                              (b) $10°$

(c) $12°$                                             (d) $5°$

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