science
Grade-4-
Easy
Question
We can see an object only when _____.
- Light from it enters our eyes
- Light from our eyes falls on it
- It emits light
- It is small in size
Hint:
- To make an object visible reflection of light is necessary and the light reflected from it enters our eyes.
The correct answer is: Light from it enters our eyes
Light enters our eyes from it.
- We can see an object when light from it enters our eyes.
- To make an object visible reflection or emission of light is necessary.
- The reflected or emitted light should enter in our eyes to make an object visible.
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Plastic lunch boxes are _____.
- Plastic lunch boxes are not able to emit light for their own.
- Plastic lunch boxes are an example of non luminous objects.
Plastic lunch boxes are _____.
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- Plastic lunch boxes are not able to emit light for their own.
- Plastic lunch boxes are an example of non luminous objects.
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The stars can be seen because they emit light.
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- They are visible to us because of emission of light by them.
The stars can be seen because they emit light.
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- Stars emit light for their own and are known as luminous objects.
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A lantern fish can be seen at night as it reflects light.
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A lantern fish can be seen at night as it reflects light.
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- At night there is no another luminous object that can make a lantern fish visible.
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The following object can be seen because it reflects light.
- Reflection of light or emission of light is necessary to make an object visible.
The following object can be seen because it reflects light.
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The object shown below can be seen because it reflects light.
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The object shown below can be seen because it reflects light.
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- The given object is emitting light or radiations.
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The object shown below can be seen because it reflects light.
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The object shown below can be seen because it reflects light.
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- The given object is visible due to the light which is bouncing off the surface of the object.
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The toy shown below is _____.
- The given toy car is emitting light for it's own so it is a luminous object.
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- The given toy car is emitting light for it's own so it is a luminous object.
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The toy shown below is _____.
- The given toy is emitting light for it's own so it is a luminous object.
The toy shown below is _____.
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- The given toy is emitting light for it's own so it is a luminous object.
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A pie is _____.
- The given object is non luminous.
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- The given object is non luminous.
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Identify the following object as luminous and/or non-luminous.
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Identify the following object as luminous and/or non-luminous.
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- The mug is a non luminous object as it doesn't emit light for it's own.
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The process of light bouncing off surfaces of objects is called ______.
- Reflection of light is necessary to see any object.
The process of light bouncing off surfaces of objects is called ______.
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- Reflection of light is necessary to see any object.
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Which of the following objects is non-luminous?
- Chair doesn't emit light for it's own so it is a non luminous object.
- Other the three options are images of luminous objects.
Which of the following objects is non-luminous?
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- Chair doesn't emit light for it's own so it is a non luminous object.
- Other the three options are images of luminous objects.
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Pick the odd one out
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- All the other three options are non luminous objects i.e tree, table and the toy. As these are not light emitting objects.
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Pick the odd one out
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The toy car shown below is ____.
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- The toy car given in the image is not emitting light for it's own so it is a non luminous object.
