Light is energy - light is type of energy is called electromagnetic energy .
sources of light -light can come from natural sources like the sun .
properties of light
Light travels in straight lines .
Light travels very fast - around 300, 000 kilometre per second .
At this speed it can go around the world 8 times in one second .
Light travels much faster than sound
For example :
Thunder and lightning start at the some time , but we will see the lightning first .
When a starting pistol is fired we see the smoke first and then hear the bang .
We see things because they reflect light into our eyes .
Luminous and non - luminous object
A luminous object is one that produces light .
A non - luminous object is one that reflect light .
Luminous object
Tube light
Candle
Sun
Reflectors
moon
mirror
snow and ice
metal surface
white walls
water surface
shadows
Shadows are places where light is " blocked .
How does the speed of light vary in different mediums?
What is the difference between reflection and refraction of light?
How does the phenomenon of diffraction occur with light waves?
What is the principle of superposition and how does it apply to light waves?
How do prisms and lenses affect the behavior of light?