NCERT Solutions for Class 6th Science

Chapter 11 - LIGHT, SHADOWS AND REFLECTIONS

(Complete Downloadable Chapter Solution PDF file is at the bottom of the page)

 

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

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 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.

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     A cylindrical object casts shadows in two ways. When light is incident on its top or bottom, circular                      shadow will be formed whereas it will give a rectangular shadow when light is incident from its side.

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. One can see objects due to reflection of light. Since there is no light in the room, no image will be                    seen.