Civil Engineering MCQJE Level Civil Engineering
Lens problem: A lens has focal length 0.25 m. Its power is:
Physics and ChemistryPhysics and ChemistryMEDIUM
Choose the correct answer
A
+4 D
B
+0.25 D
C
-4 D
D
+25 D
Correct Answer
A. +4 D
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Power P = 1/f = 1/0.25 = 4 D. This gives the answer: +4 D.
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This MCQ belongs to RRB JE Civil & Allied Engineering CBT-2 Full Mock Test Series. Full tests include timed attempts, rank comparison and subject-wise analysis.