Light Shadows and Reflections Test

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Light Shadows and Reflections Test - 15

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Question 1
1 / -0

A body which allows almost all the light to pass through it and does not reflect any light is a-

A
transparent body

B
opaque body

C
translucent body

D
polished surface

Solution

Objects which allow the light to pass through them completely without any obstruction or reflection are called $$ \bf{transparent} $$ objects.

Objects which do not allow the light to pass through them are called $$\bf{opaque} $$ objects.

Objects which allow the light to pass through them partially are called $$ \bf{translucent} $$ objects.

Polished surfaces are good reflectors of light and do not allow light to pass through it.

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

Which of the following reflects the light instead of refracting it?

A
Paper

B
Lens

C
Glass

D
Shiny silver mirrors

E
All of these

Solution

Silvering is the chemical process of coating a non-conductive substrate such as glass with a reflective substance, to produce a mirror. While the metal is often silver, the term is used for the application of any reflective metal.
Question 3
1 / -0

Butter paper is a ................. object.

A
Transparent

B
Translucent

C
Opaque

D
None of these

E
Answer required

Solution

In a translucent object, the incident light gets partially transmitted through it. Thus, we can see the things through the translucent paper but they appear blurred. Therefore, the butter paper is definitely an example of the translucent objects.
Question 4
1 / -0

Select the odd one out w.r.t. transparency (air, fog, mist, tissue paper)

A
air

B
fog

C
mist

D
tissue paper

Solution

It is a transparent medium rest all are translucent
Question 5
1 / -0

Ground glass is a _________ body.

A
translucent

B
transparent

C
opaque

D
oblique

Solution

Ground glass is a $$translucent$$ body. The opacity of this body is in between the transparent and opaque bodies.
Question 6
1 / -0

Select the odd one out w.r.t. transparency (wood, stone, cement, glass)

A
glass

B
wood

C
stone

D
cement

Solution

It is a transparent body rest all are opaque
Question 7
1 / -0

Butter paper is an example for __________ object.

A
A transparent

B
A translucent

C
An opaque

D
A luminous

Solution
Question 8
1 / -0

Shadow formation is an example of :

A
rectilinear propagation of light

B
curvilinear propagation of light

C
dispersion of light

D
none of these

Solution

Formation of shadows is due to phenomena of rectilinear propagation of light . Shadows are created when an object, animal or person blocks out a portion of a light source. Shadows form in the opposite direction of whatever is blocking that source.
Question 9
1 / -0

Which objects use the reflection of light?

A
Side mirror of a car

B
Periscope

C
Mirror

D
All of the above

Solution

The side mirror of a car is a convex mirror that uses the reflection of light.
Periscope uses two plane mirrors for image formation.
All mirrors use reflection of light to form images.
Question 10
1 / -0

Geeta placed three objects made of different materials as shown in the figure. She observed a bright spot of light at (II) but (III) would not get any spot. Then,

A
(I) and (ll) are made of transparent materials and (III) is made of opaque material.

B
(I) is made of transparent material, (II) is made of translucent material and (III) is made of opaque material.

C
(I) is made of transparent material, (II) is made of opaque material and (III) is made of either transparent or opaque or translucent material.

D
(I) and (II) are made of opaque material and (III) is made of transparent material.

Solution

Transparent material allows light to pass through it and opaque object obstructs it.

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Re-Attempt Weekly Quiz Competition

Light Shadows and Reflections Test - 15

Result

Light Shadows and Reflections Test - 15

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SHARING IS CARING

Question 1

transparent body

opaque body

translucent body

polished surface

Solution

Question 2

Paper

Lens

Glass

Shiny silver mirrors

All of these

Solution

Question 3

Transparent

Translucent

Opaque

None of these

Answer required

Solution

Question 4

air

fog

mist

tissue paper

Solution

Question 5

translucent

transparent

opaque

oblique

Solution

Question 6

glass

wood

stone

cement

Solution

Question 7

A transparent

A translucent

An opaque

A luminous

Solution

Question 8

rectilinear propagation of light

curvilinear propagation of light

dispersion of light

none of these

Solution

Question 9

Side mirror of a car

Periscope

Mirror

All of the above

Solution

Question 10

(I) and (ll) are made of transparent materials and (III) is made of opaque material.

(I) is made of transparent material, (II) is made of translucent material and (III) is made of opaque material.

(I) is made of transparent material, (II) is made of opaque material and (III) is made of either transparent or opaque or translucent material.

(I) and (II) are made of opaque material and (III) is made of transparent material.

Solution

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