light | unit 1 - lesson 1

1
Light transmits in......... lines.
2
Formation of shadow when light falls on an object is due to...........
3
The materials which let all light pass through are called........... materials.
4
All the following are examples of semi-transparent materials except..........
5
.......... Is not a source of light as it reflects the sunlight.
6
We can see objects due to...........
7
Mixing the seven light spectrum colours gives the........... Light
8
The second spectrum colour is..........
9
If you put an object at a distance of 20 cm. in front of the mirror, the distance between the image and the mirror equals...........
10
A rainbow is formed when...........