science
Grade6
Easy
Question
Which of the following is not required for us to see the objects around us?
- Light
- Shadow
- Reflection of light
- Eyes
Hint:
We can't see things in a dark room. A blind person also can't see things.
The correct answer is: Shadow
A shadow is a dark area when an opaque object blocks light from a light source . It occupies the entire 3D volume behind the object with the light in front. A shadow cross-section is a two-dimensional silhouette, or back projection, of an object blocking light.
The eye is the most important organ for us to see. Without light, we can not see anything. The light falling on any object reflects back to our eyes which send signals to the brain after which we are able to see objects.
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