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Which of the following statements is/are true?
- a)A convex lens has 4 dioptre power having a focal length 0.25 m
- b)A convex lens has -4 dioptre power having a focal length 0.25 m
- c)A concave lens has 4 dioptre power having a focal length 0.25 m
- d)A concave lens has - 4 dioptre having a focal 0.25 m
Correct answer is option 'A'. Can you explain this answer?
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Verified Answer
Which of the following statements is/are true?a)A convex lens has 4 di...
Positive sign with power and focal length indicates that the given lens is convex.
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Which of the following statements is/are true?a)A convex lens has 4 di...
Convex mirror as well as lens has positive focal length and positive power
Here, F=0.25
P=1/F
P=1/0.25
P=+4
Here, F=0.25
P=1/F
P=1/0.25
P=+4
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Community Answer
Which of the following statements is/are true?a)A convex lens has 4 di...
Statement a) A convex lens has 4 dioptre power having a focal length of 0.25 m.
Explanation:
To understand this statement, we need to first understand what dioptre power and focal length mean in the context of lenses.
1. Dioptre Power:
Dioptre power is a unit of measurement used to quantify the optical power of a lens. It is denoted by "D" and is equal to the reciprocal of the focal length of the lens in meters. Mathematically, it can be represented as:
Dioptre Power (D) = 1 / Focal Length (m)
2. Focal Length:
The focal length of a lens is the distance between the lens and the point where parallel rays of light converge or appear to diverge from. It is denoted by "f" and is measured in meters.
Now, let's analyze the statement:
a) A convex lens has 4 dioptre power having a focal length of 0.25 m.
According to the formula mentioned above, the dioptre power of a lens is equal to the reciprocal of its focal length. Therefore, if the focal length is 0.25 m, the dioptre power can be calculated as:
Dioptre Power (D) = 1 / Focal Length (m)
Dioptre Power (D) = 1 / 0.25
Dioptre Power (D) = 4 D
So, the dioptre power of a lens with a focal length of 0.25 m is indeed 4 dioptres. Hence, statement a) is true.
To summarize:
- A convex lens with a focal length of 0.25 m has a dioptre power of 4 D.
Explanation:
To understand this statement, we need to first understand what dioptre power and focal length mean in the context of lenses.
1. Dioptre Power:
Dioptre power is a unit of measurement used to quantify the optical power of a lens. It is denoted by "D" and is equal to the reciprocal of the focal length of the lens in meters. Mathematically, it can be represented as:
Dioptre Power (D) = 1 / Focal Length (m)
2. Focal Length:
The focal length of a lens is the distance between the lens and the point where parallel rays of light converge or appear to diverge from. It is denoted by "f" and is measured in meters.
Now, let's analyze the statement:
a) A convex lens has 4 dioptre power having a focal length of 0.25 m.
According to the formula mentioned above, the dioptre power of a lens is equal to the reciprocal of its focal length. Therefore, if the focal length is 0.25 m, the dioptre power can be calculated as:
Dioptre Power (D) = 1 / Focal Length (m)
Dioptre Power (D) = 1 / 0.25
Dioptre Power (D) = 4 D
So, the dioptre power of a lens with a focal length of 0.25 m is indeed 4 dioptres. Hence, statement a) is true.
To summarize:
- A convex lens with a focal length of 0.25 m has a dioptre power of 4 D.
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Which of the following statements is/are true?a)A convex lens has 4 dioptre power having a focal length 0.25 mb)A convex lens has -4 dioptre power having a focal length 0.25 mc)A concave lens has 4 dioptre power having a focal length 0.25 md)A concave lens has - 4 dioptre having a focal 0.25 mCorrect answer is option 'A'. Can you explain this answer?
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Which of the following statements is/are true?a)A convex lens has 4 dioptre power having a focal length 0.25 mb)A convex lens has -4 dioptre power having a focal length 0.25 mc)A concave lens has 4 dioptre power having a focal length 0.25 md)A concave lens has - 4 dioptre having a focal 0.25 mCorrect answer is option 'A'. Can you explain this answer? for Class 10 2024 is part of Class 10 preparation. The Question and answers have been prepared according to the Class 10 exam syllabus. Information about Which of the following statements is/are true?a)A convex lens has 4 dioptre power having a focal length 0.25 mb)A convex lens has -4 dioptre power having a focal length 0.25 mc)A concave lens has 4 dioptre power having a focal length 0.25 md)A concave lens has - 4 dioptre having a focal 0.25 mCorrect answer is option 'A'. Can you explain this answer? covers all topics & solutions for Class 10 2024 Exam. Find important definitions, questions, meanings, examples, exercises and tests below for Which of the following statements is/are true?a)A convex lens has 4 dioptre power having a focal length 0.25 mb)A convex lens has -4 dioptre power having a focal length 0.25 mc)A concave lens has 4 dioptre power having a focal length 0.25 md)A concave lens has - 4 dioptre having a focal 0.25 mCorrect answer is option 'A'. Can you explain this answer?.
Which of the following statements is/are true?a)A convex lens has 4 dioptre power having a focal length 0.25 mb)A convex lens has -4 dioptre power having a focal length 0.25 mc)A concave lens has 4 dioptre power having a focal length 0.25 md)A concave lens has - 4 dioptre having a focal 0.25 mCorrect answer is option 'A'. Can you explain this answer? for Class 10 2024 is part of Class 10 preparation. The Question and answers have been prepared according to the Class 10 exam syllabus. Information about Which of the following statements is/are true?a)A convex lens has 4 dioptre power having a focal length 0.25 mb)A convex lens has -4 dioptre power having a focal length 0.25 mc)A concave lens has 4 dioptre power having a focal length 0.25 md)A concave lens has - 4 dioptre having a focal 0.25 mCorrect answer is option 'A'. Can you explain this answer? covers all topics & solutions for Class 10 2024 Exam. Find important definitions, questions, meanings, examples, exercises and tests below for Which of the following statements is/are true?a)A convex lens has 4 dioptre power having a focal length 0.25 mb)A convex lens has -4 dioptre power having a focal length 0.25 mc)A concave lens has 4 dioptre power having a focal length 0.25 md)A concave lens has - 4 dioptre having a focal 0.25 mCorrect answer is option 'A'. Can you explain this answer?.
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Which of the following statements is/are true?a)A convex lens has 4 dioptre power having a focal length 0.25 mb)A convex lens has -4 dioptre power having a focal length 0.25 mc)A concave lens has 4 dioptre power having a focal length 0.25 md)A concave lens has - 4 dioptre having a focal 0.25 mCorrect answer is option 'A'. Can you explain this answer?, a detailed solution for Which of the following statements is/are true?a)A convex lens has 4 dioptre power having a focal length 0.25 mb)A convex lens has -4 dioptre power having a focal length 0.25 mc)A concave lens has 4 dioptre power having a focal length 0.25 md)A concave lens has - 4 dioptre having a focal 0.25 mCorrect answer is option 'A'. Can you explain this answer? has been provided alongside types of Which of the following statements is/are true?a)A convex lens has 4 dioptre power having a focal length 0.25 mb)A convex lens has -4 dioptre power having a focal length 0.25 mc)A concave lens has 4 dioptre power having a focal length 0.25 md)A concave lens has - 4 dioptre having a focal 0.25 mCorrect answer is option 'A'. Can you explain this answer? theory, EduRev gives you an
ample number of questions to practice Which of the following statements is/are true?a)A convex lens has 4 dioptre power having a focal length 0.25 mb)A convex lens has -4 dioptre power having a focal length 0.25 mc)A concave lens has 4 dioptre power having a focal length 0.25 md)A concave lens has - 4 dioptre having a focal 0.25 mCorrect answer is option 'A'. Can you explain this answer? tests, examples and also practice Class 10 tests.
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