Light Test

Result

Light Test - 19

Score
-
out of -
Rank
-
out of -

TIME Taken - -

SHARING IS CARING

If our Website helped you a little, then kindly spread our voice using Social Networks. Spread our word to your readers, friends, teachers, students & all those close ones who deserve to know what you know now.

Weekly Quiz Competition

Question 1
1 / -0

___________ are used in telescopes to reflect light.

A
Concave mirrors

B
Convex mirrors

C
Plane mirrors

D
Convex lenses

Solution

Concave mirrors are used in telescope to reflect light as they tend to converge all light coming from distant object to a close point.

Answer-(A).
Question 2
1 / -0

Choose correct option to fill the blank.
An image formed by a ___________ mirror is always of the same size as that of the object.

A
Plane

B
Convex

C
Concave

D
All of the above

Solution

Image formed by a plane mirror is always virtual,erect and of same size as that of object.
Question 3
1 / -0

The mirror used as a side mirror in a scooter is

A
Convex mirror

B
Concave mirror

C
Concave lens

D
Convex lens

Solution

Convex mirrors are used as rear-view mirrors in motor vehicles because they form virtual, erect and diminished images irrespective of distances of the object. Since small images are formed it means a large area of view can be observed in relatively small portion of mirror.Hence Convex mirror helps the driver to view large areas of the traffic behind him and he can easily detect the vehicle coming or running behind him.
Question 4
1 / -0

Why is the word AMBULANCE written as (see image) on a hospital van?

A
Image gets laterally inverted for the vehicle driver in front of the ambulance so the word AMBULANCE can be seen

B
The image gets transversely inverted for the vehicle driver in front of the ambulance so the word AMBULANCE can be seen

C
Just for fun

D
None of the above

Solution

Because the driver will see the hospital van coming from behind in the rear-view mirror and will read the laterally inverted image as AMBULANCE and give way to it.
Question 5
1 / -0

In a plane mirror, the image is formed _________ of the mirror

A
Behind

B
In front

C
Can be both depending on object distance

D
None of these

Solution

The image formed by a plane mirror is always virtual, erect, same size, and behind the mirror.
Question 6
1 / -0

Mirrors used as rear view mirrors in motor vehicles is .................

A
Concave mirror

B
Plane mirror

C
Convex mirror

D
All of the above

Solution

Convex mirrors are used as rear-view mirrors in motor vehicles because they form virtual, erect and diminished images irrespective of distances of the object.
Question 7
1 / -0

The image formed by a plane mirror is _________.

A
Virtual and erect

B
Real and Inverted

C
Virtual and inverted

D
Real and erect

Solution

A plane mirror always forms an image which is virtual in nature, erect and of the same shape and size as that of the object
Question 8
1 / -0

What is the angle of incidence if a ray is reflected by a plane mirror back along its original path?

A
$$0^{\circ}$$

B
$$90^{\circ}$$

C
$$45^{\circ}$$

D
$$30^{\circ}$$

Solution

If an incident light ray is reflected back along its original path by a plane mirror,then it means that the ray was incident normally on the plane mirror.And then its angle of incidence will be 0 degrees. Because the angle of incidence is the angle that an incident line or ray makes with perpendicular to the surface at the point of incidence.Here the incident ray is along the normal (perpendicular to mirror) so angle between incident ray and normal is zero.
Question 9
1 / -0

What name is given to the point C which is the centre of the hollow sphere of which the spherical mirror was a part?

A
Centre of curvature

B
Pole

C
Focus

D
None of these

Solution

The centre of sphere of which the spherical mirror was a part of is called the Centre Of Curvature of spherical mirror.
Question 10
1 / -0

The letter F appears as ꟻ after reflection in a plane mirror. The image is said to be _______ inverted.

A
Laterally

B
Vertically

C
Both $$A$$ and $$B$$

D
None of the above

Solution

The letter F appears as ꟻ after reflection in a plane mirror. The image is said to be laterally inverted.
In 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.