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The closest known galaxy to the Milky Way is called .....
the Canis Major Dwarf Galaxy
What is the Milky Way shape ?
spiral
Name the asteroid that we have learned ...
itokawa and ceres
what are asteroid made from ....
rocks that orbit the sun
What are the three different shape of galaxies? a. spiral, b. circle, c. elliptical, d. irregular
a,c,d
What is the name of galaxy on earth?
Milky way
the range of different colours which is produced when light passes through a glass prism or through a drop of water is called
spectrum
O Dean is wearing a blue soccer jersey. If Ahsan illuminates dean's soccer shirt with red light. what color will it show?
black
what are primary colours of light?
Red, Green, Blue
when light travels from water to air. Speed of the light will ...
faster
Ms Wida has a cyan skirt. If she illuminates white light to the skirt. What colour would the skirt reflect ?
green, blue and cyan colored light.
When the light enters more dense medium (e.g. from air into glass), it bends ________ the normal. ( away or toward?)
toward
Law of reflection state that - The angle of incidence is .................. to the angle of reflection.
equal
In the diagram, which letter represents the angle of incidence?
D
If the angle of incidence is 45 degree, what is the angle between the incident ray and reflecting surface
45
the angle between the normal and the reflected ray is
angle of reflection
The colour of light which deviates the least
Red
the colour of light that has maximum wave length
Red
what is the main cause of refraction?
change in speed of light or change in medium
Rainbow is an example of
Refraction and dispersion
The picture is an example of
Reflection
The picture is an example of ..
Refraction of light
TRUE or FALSE. If the surface of an object does not reflect light, you will not be able to see the objects.
True
TRUE or FALSE. Plane mirror, convex mirror and concave mirror are examples of a refracted light.
False
TRUE or FALSE. Objects under water appear closer to the surface than they really are because of reflection.
False
the bending of light as it passes through different materials is ....
Refraction
what is meant by reflection of light?
bouncing back of light ray into the same medium after striking the surface at a point of incidence.
________________ are objects used to bend and split the color of light.
Prism
What is non luminous objects?
the object does not emit its own light
What is the characteristic of the objects that reflect light well?
They have shiny surface


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