Can rubber ball cast two different shadow shapes
Answers
Light, Shadows and Reflections
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TABLE OF CONTENT
TABLE OF CONTENT
11.1 TRANSPARENT, OPAQUE AND TRANSLUCENT OBJECTS
11.2 WHAT EXACTLY ARE SHADOWS?
11.3 A PINHOLE CAMERA
11.4 MIRRORS AND REFLECTIONS
KEYWORDS
SUMMARY
SUGGESTED ACTIVITIES
THINGS TO THINK ABOUT
THINGS TO READ
EXERCISE
We see so many objects around us, colourful and different. On the way to school we see things like buses, cars, cycles, trees, animals and sometimes flowers. How do you think, we see all these objects?
Think of the same places at night time if it were completely dark. What will you see? Suppose you go inside a completely dark room. Are you able to see any objects in the room?
But, when you light a candle or a torch you can see the objects present in the room, isn’t it? Without light, things cannot be seen. Light helps us see objects.
The torch bulb is an object that gives out light of its own. The Sun, is another familiar object that gives its own light. During the day, its light allows us to see objects. Objects like the sun that give out or emit light of their own are called luminous objects.
What about objects like a chair, a painting or a shoe? We see these when light from a luminous object (like the Sun, a torch or an electric light) falls on these and then travels towards our eye.