A ray of light travelling in water is incident on its surface open to air. The angle of incidence is θ , which is less than the critical angle. Then there will be

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Since θ < θ c ​ , both reflection and refraction will take place. From the figure we can see that angle between reflected and refracted rays α is less than 18 0 ∘ − 2 θ . ∴ Option (c) is correct.

Physics - Geometrical Optics Question with Solution | TestHub

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