Rewrite the following statements by selecting the correct options:i. The change in the direction of propagation of light when it passes obliquely from one transparent medium to another is called……… (a) dispersion (b) scattering (c) refraction (d) reflectionii. When a ray of light travels from air to glass slab and strikes the surface of separation at 90°, then it………… (a) bends towards the normal (b) bends away from the normal (c) passes unbent (d) passes in zigzag wayiii. If a ray of light passes from a denser medium to a rarer medium in a straight line, the angle of incidence must be…………(a) 0° (b) 30° (c) 60° (d) 90°iv. A ray of light strikes a glass slab at an angle of 50° with the normal to the surface of the slab. What is the angle of incidence? (a) 50° (b) 25° (c) 40° (d) 100°v. If a ray of light propagating in air strikes a glass slab at an angle of 60° with the surface of the slab, the angle of refraction is………… (a) more than 30 ° (b) less than 30 ° (c) 60° (d) 30°