6th Grade > Physics
LIGHT SHADOWS AND REFLECTION MCQs
Total Questions : 97
| Page 3 of 10 pages
Answer: Option B. -> False
:
B
Opaque objects are those that donot allow light to pass through them. For example: wood, plastics etc.
On the other hand translucent materials are those thatallow only some light to pass through them. Examples of translucent materials are tracing paper, frosted glass andthin cloth.
:
B
Opaque objects are those that donot allow light to pass through them. For example: wood, plastics etc.
On the other hand translucent materials are those thatallow only some light to pass through them. Examples of translucent materials are tracing paper, frosted glass andthin cloth.
Answer: Option A. -> Smoke
:
A
Among the given options, smoke is not transparent because, we cannot clearly see things throughit. It does not allow all the light to completelypass through it as it is translucent in nature.
:
A
Among the given options, smoke is not transparent because, we cannot clearly see things throughit. It does not allow all the light to completelypass through it as it is translucent in nature.
Answer: Option D. -> Mirror
:
D
Among the given options, light is necessary as it is responsible for the sensation of vision or in other words it enables us to see. Without eyes, we can not sense light. The object is obviously necessary as we can not see something which does not exist. A mirror is required only when we want to see the reflection of an object.
:
D
Among the given options, light is necessary as it is responsible for the sensation of vision or in other words it enables us to see. Without eyes, we can not sense light. The object is obviously necessary as we can not see something which does not exist. A mirror is required only when we want to see the reflection of an object.
Answer: Option B. -> False
:
B
Shadow formation is due to obstruction of light by an opaque or translucent object which causes darkness on the screen behind. Image formation is due to reflection of light rays from an object. These two are completely differentphenomena. Hence, it is false.
:
B
Shadow formation is due to obstruction of light by an opaque or translucent object which causes darkness on the screen behind. Image formation is due to reflection of light rays from an object. These two are completely differentphenomena. Hence, it is false.
Answer: Option C. -> Glass sheet
:
C
A material which allows light to completely pass through it is called as transparent material. One can easily see objects on the other side of a transparent object. Out of the given options, glass is the only transparent material. So, Chintu would be holding a glass sheet.
:
C
A material which allows light to completely pass through it is called as transparent material. One can easily see objects on the other side of a transparent object. Out of the given options, glass is the only transparent material. So, Chintu would be holding a glass sheet.
Answer: Option C. -> Light
:
C
Shadow is formed on a surface only when the light is obstructed by an opaque or a translucent object. So, for the shadow formation, there should be a surface, an opaque or transluent object and incident light on the object.
:
C
Shadow is formed on a surface only when the light is obstructed by an opaque or a translucent object. So, for the shadow formation, there should be a surface, an opaque or transluent object and incident light on the object.
Answer: Option C. -> Shadow is formed when an opaque object comes in the path of light.
:
C
A shadow is formed when light is blocked by an opaque or translucent object. Opaque objects, such as a tree, completely block light and form a dark shadow. Transparent objects, such as glass, do not create a shadow because the light completely passes through them.
:
C
A shadow is formed when light is blocked by an opaque or translucent object. Opaque objects, such as a tree, completely block light and form a dark shadow. Transparent objects, such as glass, do not create a shadow because the light completely passes through them.
Answer: Option C. -> Polished and plane reflecting surface
:
C
Polished and plane reflecting surfaces without irregularities and unevenness produce clear images as they cause regular reflection.
Transparent objects causes no reflection.
Only partial reflection occurs in translucent surfaces and hence, image, if formed is unclear.
:
C
Polished and plane reflecting surfaces without irregularities and unevenness produce clear images as they cause regular reflection.
Transparent objects causes no reflection.
Only partial reflection occurs in translucent surfaces and hence, image, if formed is unclear.
:
Yes, all opaque objects cast shadows.
:
Luminous object: 1 Mark
Example: 1 Mark
Moon: 1 Mark
The objects, which emit their own light, are known as luminous objects. Example: Sun.
No, the moon is not a luminous object because it does not emit its own light. The moon appears bright at night because it reflects the sunlight that falls on it.
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