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NCERT Solutions Class 6 Science Chapter 11 – Free PDF Download

NCERT Solutions for Class 6 Science Chapter 11 Light, Shadows and Reflections provided here will help you in understanding of the concepts involved in the CBSE Class 6 syllabus(2021 – 22).

Topics covered in this Chapter are:

• TRANSPARENT, OPAQUE AND TRANSLUCENT OBJECTS
• WHAT EXACTLY ARE SHADOWS?
• A PINHOLE CAMERA
• MIRRORS AND REFLECTIONS

Exercise Questions

Q.1 Rearrange the boxes given below to make a sentence that helps us understand opaque objects.

OWS

AKE

OPAQ

UEO

BJEC

TSM

SHAD

Ans.

OPAQ

UEO

BJEC

TSM

AKE

SHAD

OWS

OPAQUE OBJECTS MAKE SHADOWS.

Q.2 Classify the objects or materials given below as opaque, transparent or translucent and luminous or non-luminous:

Air, water, a piece of rock, a sheet of aluminum, a mirror, a wooden board, a sheet of polythene, a CD, smoke, a sheet of plane glass, fog, a piece of red hot iron, an umbrella, a lighted fluorescent tube, a wall, a sheet of carbon paper, the flame of a gas burner, a sheet of cardboard, a lighted torch, a sheet of cellophane, a wire mesh, kerosene stove, sun, firefly, the moon.

Ans.

Opaque: A piece of rock, a sheet of aluminium, a mirror, a wooden board, a CD, an umbrella, a wall, a sheet of carbon paper, a sheet of cardboard.

Transparent: Air, water, a sheet of plane glass.

Translucent: A sheet of polythene, smoke, fog, a sheet of cellophane, a wire mesh.

Luminous: A piece of red hot iron, a lighted fluorescent tube, the flame of a gas burner, a lighted torch, sun, firefly, kerosene stove.

Non – luminous: Air, water, a piece of rock, a sheet of aluminium, a mirror, a wooden board, a sheet of polythene, a CD, smoke, a sheet of plane glass, fog, an umbrella, a wall, a sheet of carbon paper, a sheet of cardboard, a sheet of cellophane, a wire mesh, moon.

Q.3 Can you think of creating a shape that would give a circular shadow if held in one way and a rectangular shadow if held in another way?

Ans.

Yes, A cylindrical box can give rectangular shadow when placed in vertical directions, and a round or circular shadow is formed when placed horizontally.

Q.4 In a completely dark room, if you hold up a mirror in front of you, will you see a reflection of yourself in the mirror?

Ans.

No, because there is no source of light.