Two lenses of focal lengths 20 cm and −40 cm are held in contact. The image of an object…
Physics · Class 12 · CBSE — Ray Optics & Optical Instruments
Two lenses of focal lengths 20 cm and −40 cm are held in contact. The image of an object at infinity will be formed by the combination at
- 10 cm
- 20 cm
- 40 cm
- infinity
Answer
(C) 40 cm
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