How does shadow form? Explain it with a suitable diagram.
Answers
Answer:
Shadows are created on the screen, when a person, building or any object blocks the path of light as shown in the figure. Shadows give us some information about shapes of objects. Sometimes,shadows can also mislead us about the shape of the object. Shadows give us some information about shapes of objects.
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Shadow:
When light falls on an opaque object, light is obstructed and a dark patch on a screen kept behind is called shadow. This is because light propagates in straight line. If distance between object and screen is less, the shadow will be (umbra) dark and smaller. If the distance is increased shadow will be dim and larger.
Conditions Required for a shadow to form are:
1. There should be a source of light.
2. An opaque object.
3. A screen.
4. The opaque object is placed between the source of light.