Check sibling questions
Class 6
Chapter 11 Class 6 - Light, Shadows and Reflections

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 aluminium, 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, moon.

 

Answer:

Object

Opaque/Transparent/Translucent

Luminous/Non-Luminous

Air

Transparent

Non-Luminous 

Water

Transparent

Non-Luminous

A piece of rock

Opaque

Non-Luminous

A sheet of aluminium

Opaque

Non-Luminous

A mirror

Opaque

Non-Luminous

A wooden board

Opaque

Non-Luminous

A sheet of polythene

Translucent

Non-Luminous

A CD

Opaque

Non-Luminous

Smoke

Translucent

Non-Luminous

A sheet of plane glass

Transparent

Non-Luminous

Fog

Translucent

Non-Luminous

A piece of red hot iron

Opaque

Luminous

An umbrella

Opaque

Non-Luminous

A light fluorescent tube

Opaque

Luminous

A wall

Opaque

Non-Luminous

A sheet of carbon paper

Opaque

Non-Luminous

The flame of a gas burner

Translucent

Luminous

A sheet of cardboard

Opaque

Non-Luminous

A lighted torch

Opaque

Luminous

A sheet of cellophane

Translucent

Non-Luminous

A wire mesh

Translucent

Non-Luminous

Kerosene stove

Opaque

Luminous

Sun 

Opaque

Luminous

Firefly 

Opaque

Luminous

Moon 

Opaque

Non-Luminous

 

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CA Maninder Singh is a Chartered Accountant for the past 12 years and a teacher from the past 16 years. He teaches Science, Economics, Accounting and English at Teachoo