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शनिवार, 22 जुलाई 2017

Class–VI (CHAPTER-11) LIGHT, SHADOWS AND REFLECTIONS

Class–VI
(CHAPTER-11)
LIGHT, SHADOWS AND REFLECTIONS
Question 1.Rearrange the boxes given below to make a sentence that help us understand opaque objects.
OWSOPAQUEOBJECTTSMSHAD
Answer:
UPAQUEOBJECTTSMAKESHADOWS
Question 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 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.
Answer:
OpaqueTransparentTranslucentLuminousNon-luminous
A piece of rockAirA sheet of polytheneA lightened florescent tubeA mirror
A sheet of aluminiumWaterFogFlame of gas burnerA piece of rock
A CDA sheet of plane glassA sheet of cellophaneA lighted torchA wire mess
SmokeFireflyA piece of rock
IronStoveIron
An umbrellaSunA wall
A wallMoon
Question 4.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?
Answer: Yes,
Question 5.In a completely dark room, if you hold up a mirror in front of you, will you see
reflection of yourself in the mirror?
Answer: 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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