NCERT Solutions for Class 6 Science Chapter 11 - Light, Shadows and Reflections

Page / Exercise

Chapter 11 - Light, Shadows and Reflections 113

Solution 1


Opaque objects make shadows.

Concept insight: An opaque object does not allow light to pass through it, so a shadow is formed.

Chapter 11 - Light, Shadows and Reflections 114

Solution 2

 

Object

Object is Transparent/Translucent/Opaque

Object is Luminous/Non-luminous

Air

Transparent

Non-luminous

Water

Transparent

Non-luminous

Piece of rock

Opaque

Non-luminous

Sheet of aluminium

Opaque

Non-luminous

Mirror

Opaque

Non-luminous

Wooden board

Opaque

Non-luminous

Sheet of polythene

Translucent

Non-luminous

CD

Translucent

Non-luminous

Smoke

Translucent

Non-luminous

Sheet of plane glass

Transparent

Non-luminous

Fog

Translucent

Non-luminous

Piece of red hot iron

Opaque

Luminous

Umbrella

Opaque

Non-luminous

Lighted fluorescent tube

Opaque

Luminous

Wall

Opaque

Non-luminous

Sheet of carbon paper

Opaque

Non-luminous

Flame of a gas burner

Translucent

Luminous

Sheet of cardboard

Opaque

Non-luminous

Lighted torch

Opaque

Luminous

Sheet of cellophane

Translucent

Non-luminous

Wire mesh

Translucent

Non-luminous

Kerosene stove

Opaque

Luminous

Sun

Opaque

Luminous

Firefly

Opaque

Luminous

Moon

Opaque

Non-luminous
Solution 3

When a cylinder is held in sunlight, then a circular shadow or a rectangular shadow can be obtained depending on its orientation related to the Sun. 

Fig.

When the top of the cylinder faces the Sun, then the circular shadow is formed. On the other hand, when the side of the cylinder faces the Sun, then rectangular shadow is formed.


Solution 4

No, we will not be able to see our reflection in the mirror.

Concept insight: Image of an object is formed when light is reflected from the mirror. Since there is no source of light in the room, no image will be formed.