Light, Shadows and Reflections: science class six
Transparent, Opaque and Translucent Objects
Some objects allow the passing of light through them while some do not.
On the basis of the characteristics of objects that allow the passing of light through them or not, objects can be divided into three types, Transparent, Opaque, and Translucent.
Transparent Objects
Objects that allow passing light through them are known as Transparent Objects.
Example
A glass, a thin sheet of cellophane, clean water, air, etc. are examples of transparent objects.
Use of transparent Objects
Use of Transparent Glass in the Car and other Vehicles
Glass is used in car windows. Because a driver needs to see ahead of the vehicle, so a glass is used on the windscreen in front of the driver. Because glass is a transparent object, so using it as a windscreen, the driver is able to see the front clearly while driving.
This front glass of the car is called a windscreen because it prevents the high wind coming from the front side of the car because of the speed of the car along with it enables the driver to see out of the car in the front side clearly.
A similar glass is used in the back side of the car also. Because drivers can be able to see the vehicles coming from the backside using the side mirror.
Transparent glasses are used in the doors of bookshelves that allow the visibility of books from outside.
Transparent cellophane is used as a covering while packaging toys so that toys can be visible from the outside without getting dirt inside.
Transparent glass is used in the shops to cover them from the outside preventing dirt coming in and keeping the goods visible from the outside.
Use of Transparent Glass in the window in homes and offices
In homes, transparent glass is used in the windows. This allows enough light to come from outside the room.
Use of Transparent Glass Partition in Offices
In some of the offices, transparent glasses are used as partitions. This enables the boss or other colleagues to see each other while working.
Thus transparent objects are used to cover rooms, offices, showrooms, toys, food, and other many materials. The purpose of using a transparent material to cover a thing is to prevent getting them dirty with keeping their visibility from outside.
Translucent Objects
Objects that allow the passes of light partially through it are known as Translucent Objects.
Example
Tinted glass, Oily paper, Trace paper, a thin cloth, etc. are some examples of Translucent Objects.
Use of Translucent Objects
Tinted glass is a translucent object. Tinted glass is used in the window of bathrooms. Tinted glass allows light to come in but it does not allow visibility from one side to another.
Partially tinted glass is used in office partitions also.
Tinted glass is used as a tabletop also.
Trace paper, which is translucent, is used to trace figures and pictures, etc.
By applying the oil, a thin sheet of paper becomes translucent. Such papers are used as tracing paper.
Opaque Objects
Objects that do not allow passes of light through them are known as Opaque Objects.
Some Examples of Opaque Objects
A cardboard sheet, a wooden sheet, a log of wood, a wall made of bricks, a gate made of wood or plywood, etc. are some examples of Opaque Objects.
Use of Opaque Objects
Opaque objects are used in partition and as covering generally.
A brick wall is used as a partition between two rooms.
A brick wall is used to make houses.
A ply board is used as the table top, wardrobe partition, making doors, etc.
Ply boards and wooden boards are used in making furniture.
A thick curtain is used in windows and doors to prevent visibility.
A thick sheet of rubber is an opaque object. Such sheets are used as insulators.
The body of the pressure cooker, stainless steel, iron sheets, aluminium sheets, copper sheets, and other metal sheets are opaque objects as it does not allow passes of light through them.
Covers made of aluminium and coloured thick plastic are used as a shade of light in homes. The purpose of the use of such covers of light is to prevent light from going upwards as well as for decoration purposes.
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