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Refractive index of a medium is always greater than 1 (it cannot be less than 1) because the speed of light in any medium is always less than that in vacuum. The angle of the prism is (JEE Advanced 2016) (a) (b) (c) (d) Solution. An object at a distance of + 15 cm is slowly moved towards the pole of a convex mirror. How many grams of it will you weigh?. All Formula In Physics Class 10 Mirror Formula With Solved Numericals Class 10 Teachoo Lakhmir Singh Physics Class 10 Solutions Chapter 5 Refraction Of Light. Kinematic equations relate the variables of motion to one another. Sc 1st Year Numerical General Physics 11th Physics 12th Physics F. May 26, 2017 3 comments. The Cause of Refraction. And A=π(d/2) Substituting the above values. Sc 2nd Year ESQs F. (b) enlarged and real. 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