science
Grade-4-
Easy
Question
We are able to play mobile games by looking at a cell phone’s screen because ____.
- It emits light that it gets from elsewhere
- It emits light of its own
- It reflects light
- None of the above
Hint:
- Emission of light is also can make an object visible.
The correct answer is: It emits light of its own
It emits light of it's own
- We can play a game on Mobile phone because it emits it's own light.
- Mobile phone screen emits light of it's own which makes us able to play games on screen of a cell phone.
Related Questions to study
science
When light from any object _____, we see it.
- To make an object visible reflection or emission of light is necessary.
- The reflected or emitted light should enter in our eyes.
When light from any object _____, we see it.
scienceGrade-4-
- To make an object visible reflection or emission of light is necessary.
- The reflected or emitted light should enter in our eyes.
science
We can see an object only when _____.
- 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.
We can see an object only when _____.
scienceGrade-4-
- 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.
science
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 _____.
scienceGrade-4-
- Plastic lunch boxes are not able to emit light for their own.
- Plastic lunch boxes are an example of non luminous objects.
science
The stars can be seen because they emit light.
- Stars emit light for their own and are known as luminous objects.
- They are visible to us because of emission of light by them.
The stars can be seen because they emit light.
scienceGrade-4-
- Stars emit light for their own and are known as luminous objects.
- They are visible to us because of emission of light by them.
science
A lantern fish can be seen at night as it reflects light.
- At night there is no another luminous object that can make a lantern fish visible.
- A lantern fish emits light for it's own due to which it is visible even at night.
A lantern fish can be seen at night as it reflects light.
scienceGrade-4-
- At night there is no another luminous object that can make a lantern fish visible.
- A lantern fish emits light for it's own due to which it is visible even at night.
science
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.
scienceGrade-4-
- Reflection of light or emission of light is necessary to make an object visible.
science
The object shown below can be seen because it reflects light.
- The given object is emitting light or radiations.
- It is a luminous object.
- Emission of light is the reason which makes the given object visible.
The object shown below can be seen because it reflects light.
scienceGrade-4-
- The given object is emitting light or radiations.
- It is a luminous object.
- Emission of light is the reason which makes the given object visible.
science
The object shown below can be seen because it reflects light.
- The given object is visible due to the light which is bouncing off the surface of the object.
- Reflection of light is necessary to make an object visible.
The object shown below can be seen because it reflects light.
scienceGrade-4-
- The given object is visible due to the light which is bouncing off the surface of the object.
- Reflection of light is necessary to make an object visible.
science
The toy shown below is _____.
- The given toy car is emitting light for it's own so it is a luminous object.
The toy shown below is _____.
scienceGrade-4-
- The given toy car is emitting light for it's own so it is a luminous object.
science
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 _____.
scienceGrade-4-
- The given toy is emitting light for it's own so it is a luminous object.
science
A pie is _____.
- The given object is non luminous.
- It is not emitting light for it's own.
A pie is _____.
scienceGrade-4-
- The given object is non luminous.
- It is not emitting light for it's own.
science
Identify the following object as luminous and/or non-luminous.
- The mug is a non luminous object as it doesn't emit light for it's own.
Identify the following object as luminous and/or non-luminous.
scienceGrade-4-
- The mug is a non luminous object as it doesn't emit light for it's own.
science
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 ______.
scienceGrade-4-
- Reflection of light is necessary to see any object.
science
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?
scienceGrade-4-
- 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.
science
Pick the odd one out
- All the other three options are non luminous objects i.e tree, table and the toy. As these are not light emitting objects.
- The option a is containing image of tube lights which are emitting light for their own and hence are called luminous objects.
Pick the odd one out
scienceGrade-4-
- All the other three options are non luminous objects i.e tree, table and the toy. As these are not light emitting objects.
- The option a is containing image of tube lights which are emitting light for their own and hence are called luminous objects.
