Ch – 11 Lights, Shadows And Reflections

• Objects like the sun that give out or emit light of their own are called luminous objects.
• Objects like moon that do not give out or emit light are called non-luminous objects.
• If an object allows light to pass through it, then it is transparent object.

https://amzn.to/37RKQqH

• If an object does not allow light to pass through it, then it is opaque object.
• If an object allows only partial light to pass through it, then it is translucent object.
• The dark patch formed, when an opaque object opposes the passing of light, is known as shadow.

https://amzn.to/3rtRn2B

• Shadows give us some information about shapes of objects but sometimes mislead also.
• Three things needed to form a shadow are: an opaque object, an opaque screen and a source of light.
• Light travels in a straight line.

https://amzn.to/2MaWWD4