Imp Questions For All Chapters – General Science Class 6
Light and the Formation of Shadows
Short Questions
1. What is a luminous object?
Answer : An object that emits its own light.
2. Give one example of a luminous object.
Answer : The Sun.
3. What is a non-luminous object?
Answer : An object that does not emit its own light.
4. Give one example of a non-luminous object.
Answer : The Moon.
5. What is reflection?
Answer : Bouncing back of light from a surface.
6. Which object gives a clear reflection?
Answer : A mirror.
7. What are the three types of materials based on light passing through?
Answer : Transparent, translucent, and opaque.
8. Give an example of a transparent object.
Answer : Glass.
9. Give an example of an opaque object.
Answer : Wood.
10. What is a shadow?
Answer : A dark shape formed when an opaque object blocks light.
11. Which type of object forms a shadow?
Answer : Opaque object.
12. What is the shape of a shadow?
Answer : It depends on the shape of the object.
13. What is a pinhole camera?
Answer : A simple camera that forms an inverted image.
14. What happens when light passes through a prism?
Answer : It splits into seven colors.
15. What is needed for us to see an object?
Answer : Light must fall on the object and reflect into our eyes.
Long Questions
1. Why can we not see anything in total darkness?
Answer : We cannot see in total darkness because there is no light. Our eyes need light to reflect from objects and enter our eyes for us to see them.
2. Why does a shadow form?
Answer : A shadow forms when an opaque object blocks the path of light. Light travels in a straight line, and when something stops it, a dark shape appears on the opposite side.
3. How does a pinhole camera work?
A pinhole camera allows light to pass through a small hole, forming an inverted image on the opposite side. It works because light travels in straight lines.
4. What is the difference between a luminous and non-luminous object?
Answer : A luminous object produces its own light, like the sun or a bulb. A non-luminous object does not produce light but can reflect it, like the moon or a book.
5. What are the differences between transparent, translucent, and opaque objects?
Answer : Transparent objects allow all light to pass through (glass), translucent objects allow some light (frosted glass), and opaque objects do not allow light to pass through (wood).
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