white light enters water droplet, undergoes ____ and ____. (Rainbow) , diffraction … dispersion, reflection … refraction, refraction … dispersion, _______ reflection occurs during the formation of rainbow. , total internal, internal, total, light rays refracted and dispersed as it moves ____ __ water and ____ air. (Rainbow) , to the top … into, into … out of, out of … into, out of … evaporated into, Air above the road is _____ than upper layers. (Mirage) , colder, hotter, Hotter air has ____ optical density compared to cold air. (Mirage) , smaller, larger, Reflected light rays are _____ into observer's eyes. (Mirage) , reflected, diffracted, interference, refracted, Optical fibres are used in _____ and _____., telecommunications... medicine, education ... Medicine, education ... agriculture, fast fashion ... Agriculture, Optical fibres made from ____ or ____., tempered glass ... plastic fibre, pure glass ... plastic fibres, pure glass ... biodegradable plastic, Prism periscope are used to see objects ____ barriers. , behind, on top of, on front of, within, Images formed by prism periscope is ___ and ___ size. , flipped horizontally ... same, upright ... same, flipped vertically ... same, upright ... different, Cat's eye reflector is used for ___ of road users at night. , safety, fun, excitement, regulation.

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