CBSE Class 6 Science
Chapter 11 : Light, Shadows and Reflections
NCERT Solutions
1. Rearrange the boxes given below to make a sentence that helps us understand opaque objects.
Answer:
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, moonAnswer:
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?
Answer:
We can get both circular and rectangular shadow when we allow light to fall on a cylindrical object. When light falls on top and bottom of a cylindrical shaped object, we will get a circular shadow and if lights falls on the sides of the cylinder, we get a rectangular shaped shadow.
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?
Answer:
An image is formed in a plane mirror due the reflection of light by the mirror. If there is no light in the room, there is no reflection happens and no image is formed. Hence we cannot see our image in a completely dark room
No comments:
Post a Comment