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A conversing beam of rays is incident on a diverging lens. Having passed through the lens the rays intersect at a point 15 cm from the lens on the opposite side. If the lens is removed the point where the rays meet will move 5 cm closer to the lens. The focal length of the lens is
- a)–10 cm
- b)20 cm
- c)–30 cm
- d)5 cm
Correct answer is option 'C'. Can you explain this answer?
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A conversing beam of rays is incident on a diverging lens. Having pas...
The given problem involves a diverging lens and a converging beam of rays incident on it. We are asked to find the focal length of the lens. Let's analyze the situation step by step:
1. Description of the problem:
- A converging beam of rays is incident on a diverging lens.
- The rays pass through the lens and intersect at a point 15 cm from the lens on the opposite side.
- When the lens is removed, the point where the rays meet moves 5 cm closer to the lens.
2. Understanding a diverging lens:
- A diverging lens is a lens that causes parallel rays of light to diverge.
- The rays of light passing through a diverging lens appear to come from a point on the same side of the lens as the object.
3. Focal length of a lens:
- The focal length of a lens is the distance between the lens and the point where parallel rays of light converge or appear to converge after passing through the lens.
4. Analysis of the given situation:
- The rays of light converge at a point 15 cm from the lens when it is present.
- When the lens is removed, the point of convergence moves 5 cm closer to the lens.
5. Determining the focal length:
- The movement of the point of convergence when the lens is removed indicates that the lens was causing the rays to diverge.
- The focal length of a diverging lens is negative, as it is measured on the opposite side of the lens.
- The movement of the point of convergence from 15 cm to 10 cm closer to the lens suggests that the focal length is -30 cm.
Therefore, the correct answer is option C) -30 cm.
1. Description of the problem:
- A converging beam of rays is incident on a diverging lens.
- The rays pass through the lens and intersect at a point 15 cm from the lens on the opposite side.
- When the lens is removed, the point where the rays meet moves 5 cm closer to the lens.
2. Understanding a diverging lens:
- A diverging lens is a lens that causes parallel rays of light to diverge.
- The rays of light passing through a diverging lens appear to come from a point on the same side of the lens as the object.
3. Focal length of a lens:
- The focal length of a lens is the distance between the lens and the point where parallel rays of light converge or appear to converge after passing through the lens.
4. Analysis of the given situation:
- The rays of light converge at a point 15 cm from the lens when it is present.
- When the lens is removed, the point of convergence moves 5 cm closer to the lens.
5. Determining the focal length:
- The movement of the point of convergence when the lens is removed indicates that the lens was causing the rays to diverge.
- The focal length of a diverging lens is negative, as it is measured on the opposite side of the lens.
- The movement of the point of convergence from 15 cm to 10 cm closer to the lens suggests that the focal length is -30 cm.
Therefore, the correct answer is option C) -30 cm.
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A conversing beam of rays is incident on a diverging lens. Having passed through the lens the rays intersect at a point 15 cm from the lens on the opposite side. If the lens is removed the point where the rays meet will move 5 cm closer to the lens. The focal length of the lens isa)–10 cmb)20 cmc)–30 cmd)5 cmCorrect answer is option 'C'. Can you explain this answer? for RPSC RAS (Rajasthan) 2025 is part of RPSC RAS (Rajasthan) preparation. The Question and answers have been prepared according to the RPSC RAS (Rajasthan) exam syllabus. Information about A conversing beam of rays is incident on a diverging lens. Having passed through the lens the rays intersect at a point 15 cm from the lens on the opposite side. If the lens is removed the point where the rays meet will move 5 cm closer to the lens. The focal length of the lens isa)–10 cmb)20 cmc)–30 cmd)5 cmCorrect answer is option 'C'. Can you explain this answer? covers all topics & solutions for RPSC RAS (Rajasthan) 2025 Exam. Find important definitions, questions, meanings, examples, exercises and tests below for A conversing beam of rays is incident on a diverging lens. Having passed through the lens the rays intersect at a point 15 cm from the lens on the opposite side. If the lens is removed the point where the rays meet will move 5 cm closer to the lens. The focal length of the lens isa)–10 cmb)20 cmc)–30 cmd)5 cmCorrect answer is option 'C'. Can you explain this answer?.
A conversing beam of rays is incident on a diverging lens. Having passed through the lens the rays intersect at a point 15 cm from the lens on the opposite side. If the lens is removed the point where the rays meet will move 5 cm closer to the lens. The focal length of the lens isa)–10 cmb)20 cmc)–30 cmd)5 cmCorrect answer is option 'C'. Can you explain this answer? for RPSC RAS (Rajasthan) 2025 is part of RPSC RAS (Rajasthan) preparation. The Question and answers have been prepared according to the RPSC RAS (Rajasthan) exam syllabus. Information about A conversing beam of rays is incident on a diverging lens. Having passed through the lens the rays intersect at a point 15 cm from the lens on the opposite side. If the lens is removed the point where the rays meet will move 5 cm closer to the lens. The focal length of the lens isa)–10 cmb)20 cmc)–30 cmd)5 cmCorrect answer is option 'C'. Can you explain this answer? covers all topics & solutions for RPSC RAS (Rajasthan) 2025 Exam. Find important definitions, questions, meanings, examples, exercises and tests below for A conversing beam of rays is incident on a diverging lens. Having passed through the lens the rays intersect at a point 15 cm from the lens on the opposite side. If the lens is removed the point where the rays meet will move 5 cm closer to the lens. The focal length of the lens isa)–10 cmb)20 cmc)–30 cmd)5 cmCorrect answer is option 'C'. Can you explain this answer?.
Solutions for A conversing beam of rays is incident on a diverging lens. Having passed through the lens the rays intersect at a point 15 cm from the lens on the opposite side. If the lens is removed the point where the rays meet will move 5 cm closer to the lens. The focal length of the lens isa)–10 cmb)20 cmc)–30 cmd)5 cmCorrect answer is option 'C'. Can you explain this answer? in English & in Hindi are available as part of our courses for RPSC RAS (Rajasthan).
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A conversing beam of rays is incident on a diverging lens. Having passed through the lens the rays intersect at a point 15 cm from the lens on the opposite side. If the lens is removed the point where the rays meet will move 5 cm closer to the lens. The focal length of the lens isa)–10 cmb)20 cmc)–30 cmd)5 cmCorrect answer is option 'C'. Can you explain this answer?, a detailed solution for A conversing beam of rays is incident on a diverging lens. Having passed through the lens the rays intersect at a point 15 cm from the lens on the opposite side. If the lens is removed the point where the rays meet will move 5 cm closer to the lens. The focal length of the lens isa)–10 cmb)20 cmc)–30 cmd)5 cmCorrect answer is option 'C'. Can you explain this answer? has been provided alongside types of A conversing beam of rays is incident on a diverging lens. Having passed through the lens the rays intersect at a point 15 cm from the lens on the opposite side. If the lens is removed the point where the rays meet will move 5 cm closer to the lens. The focal length of the lens isa)–10 cmb)20 cmc)–30 cmd)5 cmCorrect answer is option 'C'. Can you explain this answer? theory, EduRev gives you an
ample number of questions to practice A conversing beam of rays is incident on a diverging lens. Having passed through the lens the rays intersect at a point 15 cm from the lens on the opposite side. If the lens is removed the point where the rays meet will move 5 cm closer to the lens. The focal length of the lens isa)–10 cmb)20 cmc)–30 cmd)5 cmCorrect answer is option 'C'. Can you explain this answer? tests, examples and also practice RPSC RAS (Rajasthan) tests.
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