alleryStart learning →As per your syllabus, a concave lens (f = −15 cm) forms an image at v = −10 cm. What is the object distance u?
A−10 cm
B+30 cm
C−30 cm
D+10 cm
Answer & Solution
Correct answer: C. −30 cm
As per your syllabus, using lens formula: 1/u = 1/v − 1/f = 1/(−10) − 1/(−15) = (−3+2)/30 = −1/30 → u = −30 cm.
Keep practising C10lensformula
Browse all C10lensformula questions for CBSE Class 10, or explore more Physics topics.
Related questions
As per your syllabus, what is 1 DIOPTRE — the SI unit of lens power?As per your syllabus, for the same convex lens problem (f=+10, u=−15), what is the MAGNIFIAs per your syllabus, what is the magnification (m) formula for a LENS — in terms of v andAs per your syllabus, Physics, what is the LENS FORMULA?