Light & Shadows
- 1. Science - Unit : 1 - Natural Phenomena Chapter – 1 : Light & Shadows
- 2. Luminous & Non - Luminous Objects • The Objects that give off Light are called Luminous Objects. • The Objects that don't give off Light are called Non - Luminous Objects. • The Non – Luminous Objects are made from different Materials. • Some Materials allow Light to pass through them and some do not.
- 4. Transparent Materials •Materials that allow all the Light to pass through them are called Transparent Materials. •Ex : Clear Glass, Clean Water
- 5. Translucent Materials •Materials that allow some Light to pass through them are called Translucent Materials. •Ex : Coloured Glass, Dirty Water
- 6. Opaque Materials • Materials that completely Block the Light are called Opaque Materials. • Ex : Mud, Wood, Mirror
- 7. Shadows
- 8. Shadow • When a Translucent OR an Opaque Object is placed before a Source of Light, a Dark Spot is formed on the opposite side of the Source of Light. • The Dark Spot is formed because Translucent Objects Block some Light, Opaque Objects Bolck the Light completely. • A Dark Spot formed by a Translucent OR an Opaque Object, When it Blocks Light is called a Shadow.
- 9. 3 Things For A Shadow To Form.... A Source of Light. A Translucent OR an Opaque Object. A Surface on which a Shadow can be Formed.
- 11. Feature - 1 A Shadow is Formed on the Opposite Side of the Light Source.
- 12. A Shadow is Black even when the Object is of any other colour. Feature - 2
- 13. Feature - 3 The Shadow shows only the Shape OR Outline of the Object, not the Details.
- 14. Feature - 4 The Size of a Shadow depends on the Distance between the Object & the Source of Light.