What is Light?
Light is a form of energy that helps us perceive objects in our surroundings. Light from a source of light falls on an object and bounces to our eyes. This is why we can see the objects around us.
Why can’t we see anything in a dark room?
In a dark room, there is no source of light. Which means no light can bounce off the objects and reach our eyes. Hence, we cannot see in a dark room.
What is a source of light called?
Bodies or objects that emit light are known as Luminous objects. The sun, a tube light, a torch are all luminous objects.
Luminous bodies
Objects that do not emit light are called Non-luminous objects. They can be classified under three categories –
- Opaque
- Transparent
- Translucent
What are Opaque objects?
Objects that do not allow light to pass through them are called Opaque objects. Wood, metal sheets, coloured plastic are some examples of an opaque object.
Opaque objects
What are Transparent objects?
Objects that allow light to pass through them completely are called Transparent objects. Water, a piece of glass, a piece of clear plastic are all examples of transparent objects.
Transparent objects
What are Translucent objects?
Objects that allow light to pass partially through them are called Translucent objects.
A glass of milky water, butter paper, a thin sheet of plastic are examples of translucent objects.
