2. 1. Rainbows result from _____________and _____________of light.

3. 2. You can see the rainbow only if it is located at the ______________of your head.

4. 3. You can search for a rainbow in a ____________or in the spray from a ___________.

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

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

7. 6. State the conditions for formation of secondary rainbow.

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

9. 8. State one difference between primary and secondary rainbow.

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

11. Answers : 1.Refraction and reflection. 2.Shadow 3.Water fall, hose/sprinkler 4.A bright red, green and violet rainbow with little blue colour can be observed. 5.White rainbow/fog bow 6.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.