Which of the following statements is true when we see 'rainbow'?
We see rainbows because of the geometry of raindrops. When the sun shines from behind us into the rain, incident rays of light enter the drop and are refracted inwards. They are reflected from the back surface of the raindrop, and refracted again as they exit the raindropandreturntooureyes.Arainbowisan optical and meteorological phenomenon that is causedbyreflectionoflightinwaterdropletsin the Earth's atmosphere, resulting in a spectrum of light appearing in the sky.
A box contains 21 ribbons out of which [A] ribbons are white, and rest is green in colour. The probability of drawing a white ribbon and a green ribbon ...
In a class, there are 16 boys and 24 girls. One of them is called out by an enroll number. What is the probability that the one called is a girl?
A bag contains 14 black and 16 white balls. One ball is drawn at random. What is the probability that the ball drawn is white?
A bag has balls of three colours. It has 8 red balls, x green balls and y blue balls, If probability of picking one green ball and that of picking one b...
A brother and a sister appear for an interview against two vacant posts in an office. The probability of the brother’s selection is 1/5 and that of th...
A bag contains 10 black and 12 white balls. One ball is drawn at random. What is the probability that the ball drawn is white?
...What will be the probability of choosing one red and one green ball from a basket containing 4 red and 5 green balls if two balls are drawn randomly?
A bag contains cards which are numbered from 2 to 90. A card is drawn at random from the bag. Find the probability that the card number is a perfect squ...
A bag contains 10 white and some black balls. If the probability of drawing a black ball from the bag is 2 times that of drawing a white ball, find the ...
A bag contains 8 red flowers and 11 yellow flowers. One flower is drawn at random. What is the probability that the flower drawn is a yellow flower?
