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WorksheetsGrade 8 Exercise Light
Total questions: 37
Worksheet time: 1hrs 5mins
What is organ that is used to see lights?
Nose
Lip
Hair
Eyes
Object that emits its own light is called?
Light ore
Light source
Below are example of light source except?
Sun
Lamp
Fire
Moon
How does light travels?
Light travels in a straight line
Light travel in a circular line
Object which is source of light is described as?
Omnious Object
Precious Object
Luminous Object
Treasures Object
Why do we can see non-luminous object?
Because they are source of light
Because they produce their own light
Because the reflect light
Below are the example of non-luminous object except?
Jupiter
Saturnus
Sun
Golden egg
Kind of material which light may pass through is called?
Transmitter material
Transparent material
Transverse material
The material which light might be absorbed is called?
Optic material
Opaque material
Optical material
When an opaque object block the light what will be formed?
Image
Luminous object
Shadow
Below which one opaque object?
Glass
White board
Water
What is the picture you see in a mirror?
Image
Virtual
Shadow
Why do we see a clear image in a mirror?
Because mirror is transparent object
Because mirror is made from glass
Because mirror has smooth surface
What is the law of reflection?
angle of incidence = angle of reflection
angle of incidence > angle of reflection
angle of incidence < angle of reflection
A ray of light come with angle of incidence is 30o. Calculate the angle of reflection!
25o
30o
45o
60o
What is the angle of normal line to the surface?
30o
45o
60o
90o
The bend of light when it enter different material is called?
Reflection
Refraction
Rarefaction
Restoration
what phenomenon is this picture represent?
Reflection
Refraction
Dispersion
Rarefaction
In what kind of object does refraction can happens?
Opaque object
Smooth shiny object
Transparent object
Light come from air and enter water with angle of incidence of 30o. What would be the angle of refraction?
21o
32o
43o
52o
Light come leaves water toward air with incident angle of 30o. What will be the angle of refraction?
41o
15o
29o
Why the swimming pool looks shallower then its real depth?
Because lights from water bend away from normal line
Because lights from water bend toward normal line
The splitting of white light into spectrum of color is called?
Reflection
Diffraction
Dispersion
Interference
What this phenomenon is called?
Difraction
Dispersion
Disconnection
What is the example of dispersion?
Pencil looks bend
Rainbow
Image in mirror
In color spectrum, which color is bent the most by prism?
Red
Yellow
Green
Violet
In color spectrum which one is bent least?
Red
Yellow
Green
Violet
What is this phenomenon is called?
Diffraction
Reflection
Refraction
Dispersion
What is this phenomenon is called?
Reflection
Diffraction
Dispersion
Refraction
Region when no light falls is called?
Image
Opaque
Shadow
If white light enters red filter which color will pass through?
Blue
Violet
Green
Red
Below are three primary color of light except?
Red
Green
Blue
Yellow
To create white light which color has to be combine?
Red+Green+Blue
Red+Yellow+Blue
Blue+Yellow+Green
When we see red car, which color is absorbed by the car?
Red
All except Red
When we see red car, which color is Reflected by the car?
Red
Blue
Which color lies between yellow and blue in spectrum of light?
Green
Red
Indigo
Red light + Blue Light =
Green
Violet
Yellow
