FundooTutor

Q1. Rearrange the boxes given below to make a sentence that help us understand opaque objects.
OWS OPAQ UE O BJECT TSM SHAD

Ans -:

OPAQ

UE O

BJEC

T S M

AKE

SHAD

OWS


Q2. 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, as 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.

Ans -:

Opaque

Transparent

Translucent

Luminous

Non-luminous

A piece of rock

Air

A sheet of polythene

A

lightened florescent tube

A mirror

A sheet of

aluminium

Water

Fog

Flame of

gas burner

A piece of rock

A CD

A sheet of plane glass

A sheet of

cellophane

A lighted

torch

A wire mess

Smoke

  

Firefly

A piece of rock

Iron

  

Stove

Iron

An umbrella

  

Sun

A wall

A wall

  

Moon

 


Q3. 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 -:

  1. Yes,


Q4. In a completely dark room, if you hold up a mirror in front of you, will you see reflection of yourself in the mirror?

Ans :- . In completely dark room, one cannot see any image in the mirror, because there is no light falling on the mirror which can be reflected to show the image.

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