5. An object is placed at a distance of 20 cm in front of a convex lens whose radius of curvature is 40 cm. The image is formed at ..............
A) Beyond 'C'
B) Between 'C' and 'F'
C) At 'C'
D) At infinite distance
Answers
Answered by
2
Answer:
option b is the correct answer of your question
deepu8436:
give me reason
Answered by
2
Answer:
the answer is option D i.e at infinty distance
Explanation:
As Radius of curvature is 40cm.
Focal length=R/2 .so f=20cm
lens formula 1/f=1/v-1/u
1/20=1/v-1/20
1/v=0/0 i.e v=infinity
so image will form at infinity
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