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WorksheetsReflection (concept 3 lesson 4)
Total questions: 16
Worksheet time: 8mins
When light rays hit an object, all the following sentences are correct, except .........
some of this rays is absorbed by the object
some of this rays is bounced off the object
some of this rays reflects to our ears causing hearing
When light hits an object, a shadow of this object is formed because……………..
light can pass through the object.
light cannot pass through the object.
this object reflects light.
a. this object is a transparent object.
Opaque material ………………………
allows light to pass through.
absorbs some of light that fall on it only.
bounces off some of light that fall on it only.
absorbs some of light that fall on it and bounces off the other
All of the following are transparent objects, except …………….
glass
water
paper.
air
You cannot see through all the following objects, except ………
human body
polished mirror
painted surface
a glass of water
Opaque objects and transparent objects are characterized by …….
both of them reflect all falling light
both of them allow all falling light to pass through.
both of them absorb all falling light
transparent objects allow most of light to pass through, while opaque objects don't
Painted surface ……………… the incoming light rays
allows to pass
absorbs only
reflects only
absorbs and reflects
Polished mirror, causes falling light rays …………….
to pass through it.
to reflect at the same angle they strike the polished mirror
to reflect at different directions they strick the polished mirror
to diffuse like that of rough surfaces
Transparent objects include air, water, polished mirror, glass and lenses.
True
False
Rough objects tended to reflect light better than smooth objects.
True
False
Both wooden block and paper reflect incoming light rays at the same angle at which they struck them
True
False
Polished mirror reflects all incoming light rays that fall on it.
True
False
We see the transparent object, when the light rays that passes through it fall on our eyes
True
False
Give reasons for:
shadow of an opaque object is formed when light falls on it
because the opaque body doesn't allow light to pass through.
because the opaque body doesn't allow light to pass through.
What happens if
You place an opaque object between a light source and a wall.
The light waves travel in the air as........
curved lines
zigzag lines.
straight lines
circular lines
