Class 6 NCERT Solutions Science Chapter 8 - Light, Shadows and Reflections
Light, Shadows and Reflections Exercise 92
Solution 1
Opaque objects make shadows.
Concept insight: An opaque object does not allow light to pass through it, so a shadow is formed.
Light, Shadows and Reflections Exercise 93
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.
