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Ce see eee eee rrr Fs, , ASSIGNMENT - 6, , , , erstsccc, , (1), , 2), , (3), , (), , (2), , (ly, (2), (3), , (1), , 2), , (3), , (dy, (2), , Time : 1 Hr., , , , Q.1. (A) Attempt the following questions:, , Fill in the blanks and rewrite statement., , (i) The wavelength of visible light range for human is . ., Find the odd one out:, , Brown, Blue, Green, Red, , Complete the analogy., , Diamond : Denser medium : : Air :, , Q.1. (B) Choose and write the correct option:, The velocity of light in air is . m/s., (a) 3x10" (b) 3x 10° (©) 15x10" d) 03x 10°, , When light ray travels from denser medium to rarer, then it ., , (a) bends towards the normal (b) bends away from the normal, , (©) goes undeviated (a) deviates randomly, , Q.2. Answer the following: (Any 2), , Write short note on: Laws of refraction., , Give scientific reasons: "Red colour is used in danger signal.”, , Solve: If the speed of light in a medium is 1.5 x 10°m/s, what is the absolute refractive index of the, medium?, , Q.3. Answer the following: (Any 2), , Draw neat and labelled diagram for partial and total internal refraction., , Complete the following statement and explain., , (i) The change in of light while going from one medium to another is called refraction., If the angle of incidence and angle of emergence of a light ray falling on a glass slab are i and e, respectively, prove that, i =e., , Q.4. Answer in detail. (Any 1), , With a neat labelled diagram explain Rainbow Formation., (A) Define refraction, , (B) (i) Complete the diagram. \ glass, , (ii) _Whatis the effect on the velocity of light, when it enters water?, , , , (iii) If the light was incident on the interface at an angle greater than critical angle; which phenomen, , on occurs?, , %, %, , , , (3), , (2), , (4), , (6), , (5)