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a, will be, , a2. ES ee, TAS qual tothe ange of incidence, , , , , , , 34, The speed of light in air is, 3 « 10° ers (B) 3 « 10° men/s, 3x1 kes =D) 3 1 vs, 36. When a ray of light travelling in glass enters |, into water obliquely F, (A) It is refracted towards the normal /, (B) It is not refracted at all :, , (C) It goes along the normal, , j

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36. Which of the following diagrams shows the, ray of light refracted correctly’, , (B), , , , , , 87. The refractive index of glass for light sot, from air to glass is ~ . The refractive inde:, oi guing rm gla wil, (A) : (B) ;, , 4 5, OF ©) 5

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$8. The refractive indices of four media A,, B, C and D are 1.44, 1.52, 1.65 and 1.36, , respectively. When light travelling in air is, incident in these media at equal angles, the, angle of refraction will be the minimum, , (A) In medium A (B) In medium B, (C) In medium C (D) In medium D, , , , , 38. The speed of light in substance X is 1.25, x 10° m/s and than in air 3 x 10° m/s. The, refractive index of this substance will be, (A) 2.4 (B) 0.4, , (C) 4.2 (D) 3.75, , , , , Related Theory }, According to the definition of Refractive index, , , , 40. The refractive indexes of four substances, P Q R and S are 1.77, 1.50, 2.42 and 1.31, , respectively. When light travelling in air is, incident Tse substances at equal angles,, the angle of refraction will be the maximum, in, , (A) Substance P, , (B) Substance Q, , (C) Substance R, , (D) Substance S