1. Rainbows result from _____________and _____________of light.

2. You can see the rainbow only

if it is located at the ______________of your head.

3. You can search for a rainbow in

a ____________or in the spray

from a ___________.

4. What would be the colour of the rainbow if water drops in the air are larger than 1mm in diameter?

5. Water droplets in air with the size smaller than 0.05mm may produces ____________.

6. State the conditions for formation of secondary rainbow.

7. We may be able to see the entire circle of the rainbow from an _________________.

8. State one difference between primary and secondary rainbow.

9. With the use of _____________and ___________, rainbow order up to thirteen can be seen in the laboratory.

Answers : 1.Refraction and reflection.2.Shadow3.Water fall, hose/sprinkler4.A bright red, green and violet rainbow with little blue colour can be observed. 5.White rainbow/fog bow6.Two reflections inside the water droplet. 7.Airplane.8.Secondary rainbow is about twice as wide as primary rainbow. OR:

Secondary rainbow has the reversed colour of the primary rainbow. 9. Laser, water droplets.