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Types of Objects | Science Class 5 PDF Download

When light falls on something, three things can happen: 

1. All the light pass through the object. 

2. Only some part of light passes through the object, some part gets reflected. 

3. No light passes through the object and all of it gets reflected. 

Types of Objects | Science Class 5

Based on their behaviour towards light, the objects can be classified as transparent, translucent and opaque. 
Types of Objects | Science Class 5

Let us discuss them in detail: 

Transparent Objects

Types of Objects | Science Class 5

You can see clearly through a plane glass windowpane because glass allows almost all the light falling on it to pass through it. Materials that allow almost all light to pass through them are called transparent materials. Air, pure water and some plastics are also transparent. 

Opaque Objects 

Types of Objects | Science Class 5

You cannot see through a piece of wood because it does not allow light to pass through it. Materials that do not allow any light to pass through them are called opaque materials. Metal, cardboard and rubber are also opaque. 

Translucent Objects 

Types of Objects | Science Class 5

Look at a lighted torch through tracing paper. You will be able to see the glow of the torch but not the torch itself. Tracing paper allows some light to pass through, but not enough to enable you to see clearly through it. Materials that allow only some light to pass through but not enough to see clearly through them are called translucent materials. Butter paper and frosted glass are also translucent.


Shadows

Types of Objects | Science Class 5

A shadow is formed when something blocks the path of light. The area behind the book does not get any light, and so it remains dark. This dark area is the shadow of the book. A shadow is always black, whatever be the colour of the object. For a shadow to be formed you need: 

1. A source of light 

2. Something that blocks the light coming from the source. 

3. A surface to from shadow on . 

Size of the Shadow

The size of the shadow depends on the distance between the source of light and the object.
So we see that:

1. When the distance between the source of light and the object is more, the size of the shadow is smaller.

2. When the distance between the source of light and the object is less, the size of the shadow is bigger. 

Types of Objects | Science Class 5

Depending on the position of the Sun is, shadows are of different shapes and sizes. Sometimes they are bigger and sometimes smaller. A shadow always forms on the opposite side of the source of light.  

Types of Objects | Science Class 5

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FAQs on Types of Objects - Science Class 5

1. What are transparent objects?
Ans. Transparent objects are objects that allow light to pass through them easily, without scattering or absorbing it. They are clear and can be seen through clearly.
2. Can you provide examples of transparent objects?
Ans. Yes, some examples of transparent objects are glass, water, air, and certain types of plastic.
3. What are opaque objects?
Ans. Opaque objects are objects that do not allow light to pass through them. They either absorb or reflect light, preventing it from passing through and making them appear solid and non-transparent.
4. Give some examples of opaque objects.
Ans. Examples of opaque objects include metals, wood, rocks, and most solid materials that do not allow light to pass through them.
5. What are translucent objects?
Ans. Translucent objects are objects that allow some light to pass through them, but not enough to see through clearly. They scatter or diffuse the light, making them appear foggy or blurry. Examples of translucent objects include frosted glass, wax paper, and certain types of plastic.
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