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light | unit 1 - lesson 1
light | unit 1 - lesson 1
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تكرار
1
Light transmits in......... lines.
broken
straight
zigzag
curved
2
Formation of shadow when light falls on an object is due to...........
all the previous reasons,
travelling of light in straight lines.
formation of images through narrow holes.
transmitting light through transparent materials.
3
The materials which let all light pass through are called........... materials.
transparent
opaque
semi-transparent
translucent
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 moon
The star
The meteor
The planet
6
We can see objects due to...........
light refraction.
light reflection.
splitting of light.
absorption of light.
7
Mixing the seven light spectrum colours gives the........... Light
black
white
green
blue
8
The second spectrum colour is..........
red.
orange.
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...........
25
10
30
20
10
A rainbow is formed when...........
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 from air to water, then its splitting into seven colours.
sunlight passes through glass.
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