Light Shadows and Reflections Test

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Light Shadows and Reflections Test - 8

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Weekly Quiz Competition

Question 1
1 / -0

The phenomenon that leads to the bouncing back of light rays is called-

A
Diffraction

B
Reflection

C
Dispersion

D
Refraction

Solution

$$ \bf{Diffraction} $$ is the phenomenon of bending of light waves around the corners of an obstacle or aperture, placed in the path of light beam.

$$ \bf{Reflection} $$ 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.

$$ \bf{Refraction} $$ 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.

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

A substance through which light can pass is called a/an :

A
Light body

B
Transparent body

C
Opaque body

D
Translucent body

Solution

An object is defined as transparent when it allows all the rays striking on its surface to pass through it.
Question 3
1 / -0

The image of our face in a plane mirror is

A
real

B
magnified

C
diminished

D
Same as the size of the object

Solution

the image formed by a plane mirror is a virtual , laterally inverted image at same distance from the mirror that of object and of same size of object.
Question 4
1 / -0

Opaque objects:

A
Allow the light to pass through them

B
Do not let the light to pass through them

C
Absorb some amount of light and let the remaining to pass through them

D
Allows the light from natural sources and rejects if it is from artificial sources

Solution

An object that allows no light pass through is an opaque object. Most of the light is either reflected by the object or absorbed. Materials such as wood, stone, metals etc. are opaque.
Question 5
1 / -0

The term reflection refers to the bending of light rays:

A
when they strike a mirror

B
when they enter a different medium

C
around a sharp edge

D
around the boundary of a narrow aperture

Solution

In the reflection phenomena, Light rays travel through the same medium. Hence, The term reflection refers to the bending of light rays when they strike a mirror.
Question 6
1 / -0

Reflection is the ........ of light off a surface.

A
Bouncing

B
hitting

C
firing

D
all

Solution

Reflection is the $$bouncing$$ of light off a surface.
Question 7
1 / -0

Opaque objects:

A
do not transmit most of the light falling on them

B
transmit most of the light falling on them

C
absorb most of the light falling on them

D
are strong and hard

Solution

An object that allows no light pass through it, is an opaque object. These objects absorb most of the light falling on them. Concrete, wood, metal are some examples of opaque materials.
Question 8
1 / -0

Which of the following describes an object that allows no light to pass through it ?

A
Transparent

B
Opaque

C
Translucent

D
Diffuse

Solution

The object, that allows no light to pass through, is called Opaque.
Question 9
1 / -0

Which of the following is a transparent object?

A
Gold

B
Glass

C
Stone

D
Plastic

Solution

Objects which allow the light to pass through them completely without any obstruction are called $$ \bf{transparent} $$ objects.
Glass has this property. So, glass is a transparent object.
Question 10
1 / -0

The phenomenon in which light that strikes a surface is thrown back into the same medium is called -

A
reflection

B
reflex action

C
refraction

D
regression

Solution

$$ \bf{Reflection} $$ 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.

A $$\bf{Reflex\ action} $$ is an involuntary and nearly instantaneous movement in response to a stimulus.

$$ \bf{Refraction} $$ 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.

$$ \bf{Regression} $$ is a technique for determining the statistical relationship between two or more variables where a change in a dependent variable depends on the change in one or more independent variables.

Hence, the correct answer is OPTION A.

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Re-Attempt Weekly Quiz Competition

Light Shadows and Reflections Test - 8

Result

Light Shadows and Reflections Test - 8

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SHARING IS CARING

Question 1

Diffraction

Reflection

Dispersion

Refraction

Solution

Question 2

Light body

Transparent body

Opaque body

Translucent body

Solution

Question 3

real

magnified

diminished

Same as the size of the object

Solution

Question 4

Allow the light to pass through them

Do not let the light to pass through them

Absorb some amount of light and let the remaining to pass through them

Allows the light from natural sources and rejects if it is from artificial sources

Solution

Question 5

when they strike a mirror

when they enter a different medium

around a sharp edge

around the boundary of a narrow aperture

Solution

Question 6

Bouncing

hitting

firing

all

Solution

Question 7

do not transmit most of the light falling on them

transmit most of the light falling on them

absorb most of the light falling on them

are strong and hard

Solution

Question 8

Transparent

Opaque

Translucent

Diffuse

Solution

Question 9

Gold

Glass

Stone

Plastic

Solution

Question 10

reflection

reflex action

refraction

regression

Solution

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