1) convex lens is a) converging b) diverging c) curved inwards d) thick at the edges 2) concave mirror forms a) virtual ,unmagnified images b) virtual,diminished images c) virtual,enlarged images d) only real images 3) To get a clear image of a distant object on the screen,the convex lens should be moved a) towards the screen b) away from the screen c) very far away from the screen d) towards or away depending on the object position 4) The power of a concave lens of focal length 50 cm a) 2D b) -2 D c) .05 D d) -.05 D 5) R.I of diamond w.r.t glass is 1.6 and the absolute R.I of glass is 1.5. The absolute R.I of diamond is a) 2.4 b) 4.2 c) 0.24 d) 0.42

Class 10-light

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