Light Test

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Light Test - 9

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Weekly Quiz Competition

Question 1
1 / -0

The bouncing of a beam of light from a polished surface in some other direction is called -

A
refraction

B
reflection

C
dispersion

D
scattering

Solution

$$ \bf{Refraction} $$ of light is the phenomenon of bending of light or change in the direction of light, when it passes obliquely from one transparent medium to another.

$$ \bf{Reflection} $$ is the phenomenon in which light rays on striking a polished surface(such as a mirror) bounce back or are sent back into the same medium.

$$\bf{Dispersion} $$ is the phenomenon of splitting of white light into its component colours (VIBGYOR) on passing through a glass prism.

$$\bf{Scattering} $$ is the phenomenon by which a beam of light is redirected or deflected in many different directions, when it passes through an imperfect medium, due to interaction with the particles of the medium.

Hence, the correct answer is OPTION B.
Question 2
1 / -0

If you raise your right hand in front of a plane mirror, what will you see in it?

A
You have raised your right hand

B
You have raised your left hand

C
You have lowered your right hand

D
You have lowered your left hand

Solution

In a plane mirror, lateral inversion is seen. Right appears left and left appears right. Raised will anyway be seen as raised as there is no vertical inversion.
Question 3
1 / -0

An image formed by a plane mirror is:

A
erect and smaller than the object

B
erect and of same size as the object

C
inverted and larger than the object

D
inverted and smaller than the object

Solution

The image of an object formed by a plane mirror will be virtual, erect, same size and at the same distance behind the mirror.
Question 4
1 / -0

Mark the statement which does not hold good for the image formed by a plane mirror:

A
Image formed by a plane mirror is erect

B
Image formed by a plane mirror can be obtained on screen

C
Image distance from a plane mirror is equal to the distance of object from the mirror

D
All the above statements are true

Solution

Image formed by a plane mirror is virtual in nature. It can not be obtained on screen.
Question 5
1 / -0

If you touch your _____ ear with your right hand in front of a plane mirror it will be seen in the mirror that your right ear is touched with _____ hand.

A
right, left

B
left, left

C
right, right

D
left, right

Solution

The plane mirror shows lateral inversion. The left appears right and the right appears left. So if you touch your left ear with your right hand in front of a plane mirror it will be seen in the mirror that your right ear is touched with your left hand.
Question 6
1 / -0

How things are visible to us?

A
Light gets reflected from our eyes and makes the object visible

B
Light from the object get reflected and makes the object visible

C
Both can occur according to the light condition

D
The reason is still not known
Question 7
1 / -0

Which property of light is known as rectilinear propagation of light?

A
Light does not need a material medium to travel

B
Light does not change the property of media through which it travels

C
Light always travels in a straight line

D
All of the above

Solution

Light always travels in a straight line.This property of light is known as rectilinear propagation of light.
Question 8
1 / -0

One feature of image formed by plane mirrors is lateral inversion which means:

A
the top part of the image appears downward and vice versa

B
left and right sides of the image are interchanged

C
image appears inverted both sideways and upside down

D
all the above

Solution

When a mirror forms an image, the left and right sides of the image are interchanged. This phenomenon is called lateral inversion as the image is laterally inverted.
For example, A girl shown in fig. is kept bag in right hand but in mirror, Bag is looking in the left hand.
Question 9
1 / -0

What are the components of sunlight:

A
Violet,red,yellow,white,magenta,purple,silver

B
Violet,indigo,blue,green,,yellow,orange,red

C
Red,yellow,black,orange,silver,violet,blue

D
Can't be determined

Solution

Sunlight is reffered as white light.It consist of seven colours,i.e VIBGYOR
Question 10
1 / -0

Primary colours of light are:

A
Red, yellow, blue

B
Blue, orange, green

C
Red, blue, green

D
All colours

Solution

Red, blue and green are known as the three primary colours. Those are often regarded as basic colours in nature. By mixing these colours in different proportions, all other colours may be obtained.

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Re-Attempt Weekly Quiz Competition

Light Test - 9

Result

Light Test - 9

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SHARING IS CARING

Question 1

refraction

reflection

dispersion

scattering

Solution

Question 2

You have raised your right hand

You have raised your left hand

You have lowered your right hand

You have lowered your left hand

Solution

Question 3

erect and smaller than the object

erect and of same size as the object

inverted and larger than the object

inverted and smaller than the object

Solution

Question 4

Image formed by a plane mirror is erect

Image formed by a plane mirror can be obtained on screen

Image distance from a plane mirror is equal to the distance of object from the mirror

All the above statements are true

Solution

Question 5

right, left

left, left

right, right

left, right

Solution

Question 6

Light gets reflected from our eyes and makes the object visible

Light from the object get reflected and makes the object visible

Both can occur according to the light condition

The reason is still not known

Question 7

Light does not need a material medium to travel

Light does not change the property of media through which it travels

Light always travels in a straight line

All of the above

Solution

Question 8

the top part of the image appears downward and vice versa

left and right sides of the image are interchanged

image appears inverted both sideways and upside down

all the above

Solution

Question 9

Violet,red,yellow,white,magenta,purple,silver

Violet,indigo,blue,green,,yellow,orange,red

Red,yellow,black,orange,silver,violet,blue

Can't be determined

Solution

Question 10

Red, yellow, blue

Blue, orange, green

Red, blue, green

All colours

Solution

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