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A convex lens of radii of curvature 20 cm and 30 cm respectively. It is silvered at the surface which has smaller radius of curvature. Then it will behave as (μg =1.5)
  • a)
    concave mirror with equivalent focal length 30/11 cm
  • b)
    concave mirror with equivalent focal length 60/11 cm
  • c)
    convexmirror with equivalent focal length 30/11 cm
  • d)
    convex mirror with equivalent focal length 60/11 cm
Correct answer is option 'B'. Can you explain this answer?
Verified Answer
A convex lens of radii of curvature 20 cm and 30 cm respectively. It i...
Focal length for lens,

Here, μg = 1.5, R1 = 20 cm, R2 = −30cm

Focal length for mirror, 

∴ Equivalent focal length

Hence, this system behaves like a concave mirror of local length -60/11 cm
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Most Upvoted Answer
A convex lens of radii of curvature 20 cm and 30 cm respectively. It i...
A) a convex mirror
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A convex lens of radii of curvature 20 cm and 30 cm respectively. It is silvered at the surface which has smaller radius of curvature. Then it will behave as (μg=1.5)a)concave mirror with equivalent focal length 30/11 cmb)concave mirror with equivalent focal length 60/11 cmc)convexmirror with equivalent focal length 30/11 cmd)convex mirror with equivalent focal length 60/11 cmCorrect answer is option 'B'. Can you explain this answer?
Question Description
A convex lens of radii of curvature 20 cm and 30 cm respectively. It is silvered at the surface which has smaller radius of curvature. Then it will behave as (μg=1.5)a)concave mirror with equivalent focal length 30/11 cmb)concave mirror with equivalent focal length 60/11 cmc)convexmirror with equivalent focal length 30/11 cmd)convex mirror with equivalent focal length 60/11 cmCorrect answer is option 'B'. Can you explain this answer? for NEET 2024 is part of NEET preparation. The Question and answers have been prepared according to the NEET exam syllabus. Information about A convex lens of radii of curvature 20 cm and 30 cm respectively. It is silvered at the surface which has smaller radius of curvature. Then it will behave as (μg=1.5)a)concave mirror with equivalent focal length 30/11 cmb)concave mirror with equivalent focal length 60/11 cmc)convexmirror with equivalent focal length 30/11 cmd)convex mirror with equivalent focal length 60/11 cmCorrect answer is option 'B'. Can you explain this answer? covers all topics & solutions for NEET 2024 Exam. Find important definitions, questions, meanings, examples, exercises and tests below for A convex lens of radii of curvature 20 cm and 30 cm respectively. It is silvered at the surface which has smaller radius of curvature. Then it will behave as (μg=1.5)a)concave mirror with equivalent focal length 30/11 cmb)concave mirror with equivalent focal length 60/11 cmc)convexmirror with equivalent focal length 30/11 cmd)convex mirror with equivalent focal length 60/11 cmCorrect answer is option 'B'. Can you explain this answer?.
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