Two thin lenses when placed in contact, then the power of combination is +10 D.

Two thin lenses when placed in contact, then the power of combination is +10 D. If they are kept 0.25 m apart, then the power reduces to +6 D. The focal lengths of the lenses (in m) will be

Options

(a) 0.5 and 0.125
(b) 0.5 and 0.75
(c) 0.125 and 0.75
(d) both have the same focal length 1.25

Correct Answer:

0.5 and 0.125

Explanation:

No explanation available. Be the first to write the explanation for this question by commenting below.

admin:

Related Questions

  1. In a common emitter transistor amplifier, the voltage gain is
  2. The number of photo electrons emitted for light of a frequency v
  3. A body of mass 4 kg is accelerated upon by a constant force travels
  4. The temperature coefficient of the resistance of a wire is 0.00125 per ⁰C.
  5. The horizontal and vertical components of earth’s magnetic field at a place