Year: 2019
Topic: Ray optics and optical instruments
Time :
1.
Pick the wrong answer in the context with rainbow.
(1). The order of colours is reversed in the secondary rainbow
(2). An observer can see a rainbow when his front is towards the sun
(3). Rainbow is a combined effect of dispersion refraction and reflection of sunlight
(4). When the light rays undergo two internal reflections in a water drop,a secondary rainbow is formed