WorksheetsNavdeep bio ch8 and geo ch8
Total questions: 78
Worksheet time: 39mins
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what is the speed of light?
-3,00,000 km per second
-2,00,000 km per second
-4,00,000 km per second
-5,00,000 km per second
Light is a form of ______ that is essential for the existence of life.
chemical
expression
term
energy
Nothing can travel faster than light in the whole universe
False
True
The object that does not produce it's own light is called
Luminous objects
Dark
Bright
Non Luminous objects
Objects that produce their own light are called
Luminous objects
Non luminous objects
Bright
Dark
Light travels in a _________ path
Straight
Curved
Slanting
None of these
Light is formed from ___________ object.
Opaque
Translucent
Transparent
light passes through opaque object
true
false
light passes through transparent objects
true
false
shadows only have one color
true
false
during a ____________ eclipse the moon casts a shadow on the earth
solar
lunar
during a ____________ eclipse the earth forms a shadow on the moon
lunar
solar
What is the best explanation for a person seeing himself in the mirror?
reflection
refraction
absorbed
flipped
When light bounces back it is _____
Reflected
Refracted
Optical Density
Absorbed
Which term describes when light bounces off of a smooth surface?
Refraction
Transmission
Reflection
Absorption
Pinhole camera is based on the ___________
Rectilinear propagation of light
Rectangular propagation of light
Circular propagation of light
None of these
Shadow of an object is always
Colourful
White
Black
Transparent
When we move an object away from the source of light, the shadow of the object _____________
Become bigger
Becomes smaller
Remains the same
None of these
When green light falls on a blue object, the colour of the shadow is _______
Green
Blue
White
black
WHERE WOULD BE A SHADY PLACE TO STAND ON A SUNNY DAY ?
IN THE MIDDLE OF A FOOTBALL GROUND
IN THE SEA
UNDER A TREE
NONE OF THE ABOVE
which of the characteristics is not exhibited by the shadow of an object?
erect
same colour as the object
can be formed on screen
can be bigger than the object
A plane mirror form an image of an object because it ........ light from the object
Absorbs
Emits
Passes
Reflects
This is not a beam of light
The headlight of a car
A torch shines
Light from firefly
Projector onto a screen
When the left side of an object appears as the right side of the image and vice versa, this phenomenon is called
Literally inversion
Lateral Invasion
Lateral Inversion
Literally Invasion
which of these are required to form the shadow of a ball
Torch
Ball
Screen
All of these
Image formed in a pinhole camera is always
Erect
Inverted
Parallel
None of these
Where will the tree's shadow be?
A
B
C
Which will make the darkest shadow? Light shining on a...
sheet of thin tissue paper
glass window
wooden chopping board
none of the above
What does reflection mean?
Light bouncing off an object.
Light is bending around an object.
Light is moving through and object.
This is no light.
What is the best explanation for Mickey seeing himself in the mirror?
Refraction
Absorption
Reflection
Flipped
There is light on the Earth even on a dark, cloudy day. This is because clouds are:
Opaque
Translucent
Transparent
Luminous
Where are periscopes used ?
Fire departments
Submarines
Military
Hospitals
Which of the following properties are used while using the periscope ?
gravitational force
reflection of light
property of lights and beams
None of these
We are able to most of the things around us because of
Regular Reflection
Irregular Reflection
How many regions does an eclipse shadow have?
1
2
3
4
When light hits an area and bounces back it is called:
echo
refraction
reflection
absorbing
Light travels through air, water, glass and many other materials. What path does it travel to get from one place to another?
sideways
back and forth
straight
up and down
When light hits a barrier that is solid/opaque what is usually created?
a hot object
a shadow
nothing
Which color shirt would you rather wear outside on a sunny 90 degree day?
black
white
gray
navy blue
What is the best explanation for Mickey seeing himself in the mirror?
refraction
absorbed
reflection
flipped
If you can see light through an object it is called...
opaque
plastic
transparent
which of the characteristics is not exhibited by the shadow of an object?
erect
can be formed on screen
same colour as the object
can be bigger than the object
A plane mirror form an image of an object because it ........ light from the object
absorbs
reflects
passes
emits
Light travels in_______
straight line
curved line
zig-zag line
randomly
When an opaque object comes in the path of light it forms
(a) an image with colours
(b) shadow
(c) black and white image
(d) depends on the colour of the light
3)Which types of objects do not allow light to pass through them?
(a) Translucent
(b) Opaque
(c) Transparent
(d) Penumbra
4)Which is an example of a translucent object?
(a) A thin sheet of paper
(b) A thin glass slab
(c) A thin iron sheet
(d) All of these
5)Bouncing back of light from shining surfaces is called
(a) Reflection
(b) Refraction
(c) Bending
(d) Dispersion
6)What is lateral inversion?
(a) Image becomes inverted
(b) Image bends laterally
(c) Right of the object appears left of the image
(d) All of these happen
7)An example for the Rectilinear Propagation of light
a)Formation of clouds
b)Formation of day and night
c) Formation of rainbow
d) Formation of rain
8)The process of light turning back after striking the shiny side of mirror is called
(a)Refraction
(b)Shadow
(c)Reflection
(d)Umbra
9)The speed of light
a)299,792km/s
b)299,792m/s
c)29,792km/s
d)29,791m/s
10)This screen is a must to receive the shadow
a)transparent screen
b) Opaque screen
c) Translucent screen
d)No screen
An object or material could be opaque, transparent, translucent or ……………….. .
(a)
This is a …………… on which the shadow is formed.
(a)
A …………….. is a dark outline of an opaque object that blocks light coming from a source.
(a)
Image formed by a plane mirror is …………….. .
(a)
In a plane mirror, our left hand looks like right hand. This phenomenon is called ……………………… .
(a)
……………… objects cast no shadow.
(a)
Opaque objects cast …………………. shadows in morning and evening while ………………… shadows at noon.
(a)
Light travels in a ………….. .
(a)
