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ercc, , ees, , qd), 2), @), q), , Q), , a), , Q), @), , (ay, (2), , @), , (1), (2), , , , Q.1. (A) Fill in the blanks:, , Myopia can be corrected by using spectacle of - -lens., , The tendency of pupil to adjust the opening for light is called - —, , In simple microscope - -lens is used., , Q.1. (B) Choose and write the correct option:, , Farsightedness can be corrected by using - lens., , (a) cylindrical (b) concave (c) diverging (d) converging, The perception of dim light is concerned with - cells., , (a) Rod (b) Cone (c) Amoeboid (d) Squamous, Q.2. Answer the following: (Any 2), , An object is placed at a distance of 15 cm from a convex lens. If the focal length of the lens is 60 cm,, find the image distance., Give scientific reasons: “We cannot clearly see an object kept at a distance less than 25 cm from eye.”, Distinguish between farsightedness and nearsightedness., Q.3. Answer the following: (Any 2), Draw a neat and labelled diagram of human eye., A5cm high object is placed at a distance of 25 cm from a converging lens of focal length of 10 cm., Determine the position, size and type of the image., Draw a neat and labelled ray diagram for convex lens., (i) When object is beyond 2F, (ii) When object is at infinity, Q.4. Answer the following: (Any 1), Explain the working of an astronomical telescope using refraction of light., Write a short note on (i) Hypermetropia. _ (ii) Myopia, ooo, , “Science Ne 2 St”té~<“<i=C=Ctsi‘is‘CtsCStstSSS, , 4), , Nae eee Oe eee eee ee