Class 6 Exam > Class 6 Questions > Which of the following statements is not true...
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Which of the following statements is not true?
- a)A cylindrical object can cast a rectangular as well as a circular shadow.
- b)Polished surface produces a clear image.
- c)The umbra is the region of a shadow which is grey in colour.
- d)Light travels in a straight line.
Correct answer is option 'C'. Can you explain this answer?
Most Upvoted Answer
Which of the following statements is not true?a)A cylindrical object c...
- A: A cylindrical object can cast a rectangular as well as a circular shadow.
This is true. Depending on the angle of the light source and the orientation of the cylindrical object, it can cast both rectangular (if the object is viewed from the side) and circular (if viewed from the top) shadows. - B: Polished surface produces a clear image.
This is true. A polished surface causes specular reflection, which creates clear and sharp images, as it reflects light in parallel directions. - C: The umbra is the region of a shadow which is grey in colour.
This is false. The umbra is the darkest part of a shadow, where the light source is completely blocked. It is typically black or very dark, not grey. The penumbra is the lighter, greyish region of the shadow, where some, but not all, of the light is blocked. - D: Light travels in a straight line.
This is true. In the absence of obstacles or medium changes, light travels in a straight line.
Thus, the statement that is not true is C: The umbra is the region of a shadow which is grey in colour.
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Which of the following statements is not true?a)A cylindrical object c...
Understanding Shadows and Light
In the context of shadows and light, let’s clarify why option 'C' is not true.
What is the Umbra?
- The umbra refers to the darkest part of a shadow where the light source is completely blocked.
- Contrary to option 'C', the umbra is not grey; it appears black or very dark because it lacks direct light.
Characteristics of Shadows
- Shadows are formed when an opaque object obstructs light.
- The nature of the shadow can vary based on the shape of the object and the angle of the light source.
Analysis of Other Options
- Option A: A cylindrical object can cast shadows of different shapes depending on the light source’s angle. This statement is true.
- Option B: A polished surface reflects light more effectively, producing clearer images. This statement is also true.
- Option D: Light does indeed travel in straight lines unless it interacts with different media (like bending in water). This statement is true as well.
Conclusion
- Therefore, while options A, B, and D are accurate, option C is misleading as the umbra is characterized by a lack of light, resulting in a dark shadow instead of grey. Understanding these fundamentals helps in grasping how shadows are formed and perceived.
In the context of shadows and light, let’s clarify why option 'C' is not true.
What is the Umbra?
- The umbra refers to the darkest part of a shadow where the light source is completely blocked.
- Contrary to option 'C', the umbra is not grey; it appears black or very dark because it lacks direct light.
Characteristics of Shadows
- Shadows are formed when an opaque object obstructs light.
- The nature of the shadow can vary based on the shape of the object and the angle of the light source.
Analysis of Other Options
- Option A: A cylindrical object can cast shadows of different shapes depending on the light source’s angle. This statement is true.
- Option B: A polished surface reflects light more effectively, producing clearer images. This statement is also true.
- Option D: Light does indeed travel in straight lines unless it interacts with different media (like bending in water). This statement is true as well.
Conclusion
- Therefore, while options A, B, and D are accurate, option C is misleading as the umbra is characterized by a lack of light, resulting in a dark shadow instead of grey. Understanding these fundamentals helps in grasping how shadows are formed and perceived.
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Which of the following statements is not true?a)A cylindrical object can cast a rectangular as well as a circular shadow.b)Polished surface produces a clear image.c)The umbra is the region of a shadow which is grey in colour.d)Light travels in a straight line.Correct answer is option 'C'. Can you explain this answer? for Class 6 2025 is part of Class 6 preparation. The Question and answers have been prepared according to the Class 6 exam syllabus. Information about Which of the following statements is not true?a)A cylindrical object can cast a rectangular as well as a circular shadow.b)Polished surface produces a clear image.c)The umbra is the region of a shadow which is grey in colour.d)Light travels in a straight line.Correct answer is option 'C'. Can you explain this answer? covers all topics & solutions for Class 6 2025 Exam. Find important definitions, questions, meanings, examples, exercises and tests below for Which of the following statements is not true?a)A cylindrical object can cast a rectangular as well as a circular shadow.b)Polished surface produces a clear image.c)The umbra is the region of a shadow which is grey in colour.d)Light travels in a straight line.Correct answer is option 'C'. Can you explain this answer?.
Which of the following statements is not true?a)A cylindrical object can cast a rectangular as well as a circular shadow.b)Polished surface produces a clear image.c)The umbra is the region of a shadow which is grey in colour.d)Light travels in a straight line.Correct answer is option 'C'. Can you explain this answer? for Class 6 2025 is part of Class 6 preparation. The Question and answers have been prepared according to the Class 6 exam syllabus. Information about Which of the following statements is not true?a)A cylindrical object can cast a rectangular as well as a circular shadow.b)Polished surface produces a clear image.c)The umbra is the region of a shadow which is grey in colour.d)Light travels in a straight line.Correct answer is option 'C'. Can you explain this answer? covers all topics & solutions for Class 6 2025 Exam. Find important definitions, questions, meanings, examples, exercises and tests below for Which of the following statements is not true?a)A cylindrical object can cast a rectangular as well as a circular shadow.b)Polished surface produces a clear image.c)The umbra is the region of a shadow which is grey in colour.d)Light travels in a straight line.Correct answer is option 'C'. Can you explain this answer?.
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Which of the following statements is not true?a)A cylindrical object can cast a rectangular as well as a circular shadow.b)Polished surface produces a clear image.c)The umbra is the region of a shadow which is grey in colour.d)Light travels in a straight line.Correct answer is option 'C'. Can you explain this answer?, a detailed solution for Which of the following statements is not true?a)A cylindrical object can cast a rectangular as well as a circular shadow.b)Polished surface produces a clear image.c)The umbra is the region of a shadow which is grey in colour.d)Light travels in a straight line.Correct answer is option 'C'. Can you explain this answer? has been provided alongside types of Which of the following statements is not true?a)A cylindrical object can cast a rectangular as well as a circular shadow.b)Polished surface produces a clear image.c)The umbra is the region of a shadow which is grey in colour.d)Light travels in a straight line.Correct answer is option 'C'. Can you explain this answer? theory, EduRev gives you an
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