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light | unit 1 - lesson 1
light | unit 1 - lesson 1
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تكرار
1
Light transmits in......... lines.
straight
zigzag
curved
broken
2
Formation of shadow when light falls on an object is due to...........
formation of images through narrow holes.
transmitting light through transparent materials.
all the previous reasons,
travelling of light in straight lines.
3
The materials which let all light pass through are called........... materials.
transparent
translucent
opaque
semi-transparent
4
All the following are examples of semi-transparent materials except..........
tissue paper.
foil paper.
frosted glass cup.
frosted light bulbs.
5
.......... Is not a source of light as it reflects the sunlight.
The meteor
The star
The moon
The planet
6
We can see objects due to...........
light reflection.
light refraction.
splitting of light.
absorption of light.
7
Mixing the seven light spectrum colours gives the........... Light
black
green
blue
white
8
The second spectrum colour is..........
orange.
red.
violet.
green.
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...........
20
10
30
25
10
A rainbow is formed when...........
sunlight passes from air to water, then its splitting into seven colours.
sunlight passes from the drops of rain water to air, then its splitting into seven spectrum colours.
sunlight doesn't pass through any medium.
sunlight passes through glass.
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