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Total questions: 20
Worksheet time: 10mins
Which images are opaque?
A & C
A,C,E, & F
D, E, & F
B & E
1 Calorie =_____ Joules.
4.18
42.2
4.22
4.418
Plane mirrors are arranged parallel to each other to get:
a single image
two images
a large number of reflected images
no image
How many colours is white light made up of?
A single colour
Primary colours
Five colours
Seven colours
Light rays emitted from a source travels
Perpendicular to each other
Parallel to each other
Intersecting to each other
Diagonal to each other
Which of the following is used by an E.N.T. doctor?
Convex mirror
Convex lens
Plane mirror
Concave mirror
An object of length 5 cm is placed at a distance of 20 cm in front of a plane mirror. The size and position will be
5 cm high and 20 cm behind the mirror
5 cm high and 20 cm in front of mirror
5 cm high and 10 cm behind the mirror
3 cm high and 20 cm behind the mirror
On the basis of following features identify the correct option. (I) Image formed is virtual and erect (II) Size of image formed is equal to size of object (III) The right side of the object appears as the left of its image and vice-versa.
Concave mirror
Convex mirror
Plane mirror
both (a) and (b)
An inverted image can be seen in a convex mirror,
under no circumstances
when the object is very far from the mirror
equal to the radius of curvature of the mirror
when the distance of the object from the mirror is equal to the focal length of the mirror
The formed by a plane mirror can be obtained on screen because it is
Real and inverted
Virtual and inverted
Virtual and erect
Real and erect
The sun is seen before the actual sun rise because of
reflection
refraction
scattering of light
rectilinear propagation of light
Concave mirror is used as shaving mirror because it forms
Real and erect image
Virtual and inverted image
Virtual and magnified image
Real and magnified image
In nature, rainbow is formed due to the dispersion of sunlight. The optical aid responsible for it is/are:
molecules of carbon dioxide
tiny droplets of water
molecules of nitrogen dioxide
none of the above
An air bubble in water will act like a
convex lens
convex mirror
concave lens
concave mirror
What is the nature of the propagation of light?
Curvilinear
Rectilinear
Random
Circular
Identify the nature of light emitted from a torchlight.
Convergent
Divergent
Parallel
Irregular
Why cant we see anything in a dark room?
Everything is black in colour.
Our eyes do not work in darkness.
No light reaches our eyes.
All the light gets scattered.
In which of the following medium light travels fastest?
Water
Diamond
Glass
Air
A ray of light is incident on a plane mirror at an angle of incidence of 30°.What is the angle of reflection?
30∘
60∘
90∘
120∘
What happens to light after it hits a mirror?
It goes through the mirror and bend.
It goes straight through the mirror.
It goes around the mirror.
It bounces off the mirror.
