Worksheetsmore about light grade 8
Total questions: 35
Worksheet time: 19mins
When the candle is lit some of the candlelight will shine through the hole. Which diagram best shows where the light appears on the opposite wall inside the box?
Which of the following explains why Jia Xin can see the book on the table?
What happens to the light that passes through cornea?
it gets reflected.
it gets shattered.
it gets refracted.
what is the function of iris in the eye?
it detect colours.
it focuses the light.
it controls the size of pupil.
why pupil gets smaller in bright light?
to get as much light as possible.
to prevent damaged to eye due to bright light.
to make sure light gets refracted.
The image formed on the retina is _____________
upside
upside down
rotated at 90 degrees angle.
The transparent covering of eye is called ___________.
pupil
iris
cornea
Which part of the camera focuses light?
sensor
shutter
lens
special cells in the retina change the light energy into electrical impulses called ___________
optic impulses
nerve impulses
connective impulses
Nerve impulses are sent to the brain along the _____________
optic nerve
nasal nerve
pulmonary nerve
What is the function of rod cells?
to detect colours in bright light.
to detect colours in dim light.
to detect secondary colours.
What is the function of cone cells?
to detect colours in dim light.
to detect secondary colours in dim light.
to detect colours in bright light.
What is the near point of a normal human eye?
25 cm
Infinity
-25 cm
Splitting of light into its colours is known as ________ of light
VIBGYOR
Spectrum
Rainbow
Dispersion
__________ are used in submarines, tanks and also by soldiers in bunkers to see things outside
Periscope
Kaleidoscope
Multiple images
Dispersion
An image formed by a mirror the left of the object appears on the right and the right appears on the left this is known as _________
Lateral inversion
Inverted image
Virtual image
ASSERTION (A): A rainbow is formed when white light is incident on raindrops.
REASON (R): White light contains seven colours and it undergoes dispersion inside a raindrop
Both A and R are correct, and R is correct explanation of A
Both A and R are correct, but R is not correct explanation of A
A is correct and R is incorrect
Both are incorrect
Who established that white light consist of light of seven colours
Newton
Joule
Pascal
Huygen
What happens when ray of light travels from air to glass medium
It bends towards the normal
It bends away from the normal
I t does not deviate from its path
None of these
The eye lens is held in position by____
rods and cones
iris and pupil
cornea
none of these
A virtual image is one which
can be taken on the screen
cannot be taken on the screen
sometimes taken and sometimes not taken
is formed only by concave mirror
Air is not visible because it
is nearly a perfectly transparent substance
neither absorb nor reflects light
transmits whole of light
All the above are correct
The ray of light which falls on the mirror's reflecting surface is called the
Incident ray
Reflected ray
Normal
Falling ray
Angle i =
Incident ray
Angle r
Angle n
Angle o
The phenomenon due to which a parallel beam of light on striking a smooth and highly polished surface is reflected back as a parallel beam of light is called
Diffused reflection
Regular reflection
Irregular reflection
Refraction
The outermost covering of the eye made of white tough fibrous tissues is
Cornea
Sclera
Retina
Choroid
At the junction of the optic nerve and the retina, no vision is possible because of no sensory cells at that spot. Name that spot.
Blind spot
Junction spot
Sensory spot
Suspensory spot
The______________ is a device that produces beautiful patterns when it is rotated because of the multiple reflection of light.
Periscope
Kaleidoscope
Microscope
Telescope
Q. Which of the following is the correct order in which light travels through the eye?
Cornea, Lens, Retina, Pupil, Optic Nerve
Pupil, Cornea, Lens, Retina, Optic Nerve
Cornea, Retina, Lens, Pupil, Optic Nerve
Cornea, Pupil, Lens, Retina, Optic Nerve
