WorksheetsGrade 8 8J Review
Total questions: 37
Worksheet time: 20mins
Light moves in _______ waves
Circular
Latitudinal
Longitudinal
Transverse
Thunder(雷) following lightning(閃電) shows that...
Light travels faster than sound
Sound travels faster than light
Sound is a form of energy and light is not
Light is a form of energy and sound is not
These two kinds of glass are examples of what kinds of material?
Opaque
Translucent
Transparent
Dark
When light hits an opaque material it is...
absorbed
diffused
reflected
transferred through
The difference between transparent and translucent materials is that translucent materials ______ and transparent materials______.
let light transfer through; do not let light transfer through
scatter light; let light transfer through
Do not allow light through; scatter light
scatter light;
do not let light transfer through
Light emits from the light bulb and an image is captured in the pinhole camera. What does the pinhole camera teach us about light?
That light moves upside down
That light can only move through pinholes
That light can be trapped in a box
That light moves in a straight line
Even transparent materials reflect some light
True
False
The light reflected by most opaque materials is scattered. It goes off in all directions. This is called _____ reflection.
opaque
scatter
diffuse
true
Light scatters (reflects at different angles) in 'diffuse reflection' because the material it reflects off of is...
rough
smooth
transparent
diffuse
Which kind of material does not reflect any light?
Opaque
Transparent
Translucent
All materials reflect some light
This image shows the Law of Reflection which means that the angle of incidence (the angle that the light hits the mirror) will be ______ the angle of reflection
greater than
the same as
half of
less than
How does the size of an image in a (plane) mirror compare to the actual size of the object?
The object is smaller in the mirror
the object is the same size in the mirror
The object is bigger in the mirror
The image in a plane mirror is ______ distance behind the mirror as the object in front of it.
a shorter distance
the same distance
a longer distance
The image in a plane mirror ________
is the same as the object
has left and right reversed (swapped over)
has top and bottom reversed (swapped over)
has the inside and outside reversed (swapped over)
______ occurs whenever light travels from one transparent substance to another and is the change in direction of light.
diffusion
reflection
refraction
absorption
Refraction does not occur If the light passes through the interface at a _____ degree angle (relative to the substance it is going through)
0
90
180
270
The line where two substances meet is called the:
interface
intersection
interaction
intersubstance
When light passes from one substance to another it could:
Change speed
change wavelength
bend to/from the normal
Change frequency
Which number shows a normal of the glass block?
1
4
7
9
A lens is _____ and ______.
straight; translucent
straight; transparent
curved; translucent
curved; transparent
The _____ of the camera converts the light energy into an electrical charge
aperature
lens
sensor
shutter
Part 4 controls how much light is let into the camera and is called the _____
aperature
lens
sensor
shutter
The part of the eye that has the same function as the aperature of a camera is the ____
cornea
iris
nerve
retina
The image received by the eye is upside down, but we see it as right side up because of our_____
retina
lens
eye lid
brain
Which part is in both the camera and the eye?
sensor
iris
lens
pupil
The _____ of the eye detect colour
iris
cones
rods
circles
The _____ of the eye detect light
iris
cones
rods
circles
These three primary colours of light are:
Red
Blue
Green
Yellow
Which colour of light does white light contain?
red
blue
green
yellow
Colour Blindness is when someone cannot tell certain colours apart (ex. green and red look the same). This is a problem with the _____ in the eye
cones
circles
rods
cubes
The colour of light is determined by its...
size
frequency
angle
reflection
Different frequencies of light are refracted by different amounts which is why we can...
Glass is transparent by wood is opaque
a pinhole camera will invert(flip) and image top to bottom
split up white light using a prism
A mirror will invert(flip) an image lft to right
Which is NOT a colour of the spectrum(rainbow)?
Blue
Grey
Indigo
Violet
If an object looks red it is because it has absorbed _____ light and it has reflected ______ light
red; all other coloured
white; red
red; green
all other coloured; red
An object appears black when it reflects....
white light
no light
black light
red and green light
What colour would the hat appear under a red light?
Black
Blue
Red
White
Sound moves in _______ waves
Circular
Latitudinal
Longitudinal
Transverse
