Font size
WorksheetsLight Year 8 Formative Quiz
Total questions: 30
Worksheet time: 15mins
Which travels most quickly?
water waves
sound waves
light waves
Light travels in
circular lines
straight lines
around corners
The angle of incidence always equals what?
The angle of reflection
The angle of dispersion
The angle of exodus
What type of reflection is seen in a mirror?
specular reflection
diffuse scattering
normal
When materials are placed in the path of a light beam various things can happen. Which word describes materials that will not allow light through?
opaque
transparent
translucent
transmitter
Which of the following is luminous
the moon
a candle
a mirror
white paint
When an incident ray of light hits a water or glass surface, most of the light passes through the air-water interface and a little is reflected. Which of the four rays is the reflected ray?
ray 3
ray 2
ray 4
ray 1
The diagram shows what happens to a ray of light when it strikes the surface of a plane mirror. The vertical dotted line is at 90o to the surface of the mirror. Which statement is NOT true?
angle 1 always equals angle 3
angle 2 always equals angle 3
angle 3 = angle of reflection
angle 2 = angle of incidence
An instrument which enables us to see objects which are not in our direct line of sight is called
microscope
telescope
kaleidoscope
periscope
Which of the following statements is the correct reason we can see objects that are NOT luminous?
Our eyes give out light
They bend light into our eyes
They reflect light into our eyes
They shine light into our eyes
The speed of light is
300 million meters per second
300 million miles per second
3 million meters per second
3 million miles per second
What is the size and position of an image formed by a plane mirror?
Same size, closer to the mirror
Same size, same distance away from the mirror
Enlarged, closer to the mirror
Reduced, farther from the mirror
Ray which is striking surface is
normal ray
incident ray
reflected ray
all of them
Parallel rays falling on rough surface will produce rays which are
scattered
smooth
beams
parallel
When materials are placed in the path of a light beam various things can happen. Which word describes materials that allow light through but scatters it around?
opaque
translucent
absorber
transparent
What is reflection?
Reflection is the bouncing of light off the surface that it strikes on.
Reflection is the absorbing of light off the surface that it strikes on.
Reflection is the bending of light off the surface that it strikes on.
Reflection is the scattering of light off the surface that it strikes on.
A plane mirror produces a top-to-bottom reversal and a left-to-right reversal
true
false
If a man wishes to use a plane mirror on a wall to view both his head and his feet as he stands in front of the mirror, the required length of the mirror ____.
is equal to the height of the man.
is equal to one half the height of the man.
depends on the distance the man stands from the mirror.
depends on both the height of the man and the distance from the man to the mirror.
If light ray strikes a surface at right angle , it is reflected along
same path
opposite direction
reflected acutely
obtuse reflected
In a ray diagram, a normal is a line drawn at what angle to the surface?
180° to the mirror's surface
45° to the mirror's surface
60° to the mirror's surface
90° to the mirror's surface
What happens to the light particles when light hits an uneven surface.
They are reflected off in a straight line.
They are scattered in many directions.
They are absorbed by the surface.
They pass through the surface.
Why is the moon classified as a light reflector instead of a light producer?
The moon makes its own light from energy within it.
The moon is visible because light from the sun bounces off of it.
The moon is not visible from earth during the new moon phase.
The moon glows from radiant energy below its surface.
When light travels from air to glass, it changes direction. What is the name of this effect?
Reflection
Emergence
Refraction
Normalization
Give the letter of one refracted ray
A
B
C
D
In some parts of the world people catch fish using spears, When they see the image of a fish in the water, where should they aim?
Below where they see the fish
Above where they see the fish
Directly where they see the fish
A pupil points a ray of white light at a screen. The students then puts a green filter in a ray of white light. What happens to the spectrum on the screen?
The whole spectrum turns green
The green part of the spectrum disappears, but the other colours stay the same
The green part of the spectrum stays the same but the other colours disappear
The whole spectrum disappears
Black is not a colour; a black object is one that absorbs all the colours of the visible spectrum and reflects none of them back.
true
false
The pupil is a hole covered with a clear surface that lets light into your eye. Select the correct statement(s) below is correct
the hole gets smaller in the dark to keep light inside
the hole gets bigger in the dark to let more light in
the hole gets smaller in the light to protect your eye
the gets bigger in the to help you see more clearly
Which list has correctly arranged the structures of the eye (as light travels through the eye)
cornea - pupil - lens - retina - optic nerve - brain
pupil - retina - cornea - lens - optic nerve - brain
retina - pupil - cornea - lens - brain - optic nerve
which of the 2 statements below are correct
The brain via signals received from the optic nerves eventually turns the image the right way up
The reflection on the image we see in the lens is inverted
Because the front part of the eye is curved, it refracts light, creating an upside down image on the retina
the rods and cones first detect the image and the turn the image 'right way up".
