Two lenses of power 15 D and -3 D are placed in contact.

Two lenses of power 15 D and -3 D are placed in contact. The focal length of the combinations is

Options

(a) 10 cm
(b) 15 cm
(c) 12 cm
(d) 8.33 cm

Correct Answer:

8.33 cm

Explanation:

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

admin:

Related Questions

  1. For photoelectric emission to take place
  2. Two identical flutes produce fundamental notes of frequency 300 Hz at 27° C
  3. The resultant of two forces, one double the other in magnitude, is perpendicular
  4. A projectile is fired from the surface of the earth with a velocity of 5 m s⁻¹ and angle
  5. Current in a coil changes from 4 A to zero in 0.1 second and the emf induced is 100V