Navigate

An object is placed at a distance of 10 cm from a co-axial combination of two lenses

An object is placed at a distance of 10 cm from a co-axial combination of two lenses A and B in contact. The combination forms a real image three times the size of the object. If lens B is concave with a focal length of 30 cm. The nature and focal length of lens A is

Options

(a) convex, 12 cm
(b) concave,12 cm
(c) convex, 6 cm
(d) convex, 18 cm

Correct Answer:

convex, 6 cm

Explanation:

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

AMU2012
admin:

Related Questions

  1. The identical loops of copper and aluminium are moving with the same speed
  2. Charge passing through a conductor of cross-section area A=0.3 m² is given
  3. The magnetic field at a point on the axis of a long solenoid having 5 turns per cm
  4. The temperature of ideal gas is reduced from 927° C to 27° C. The r.m.s velocity
  5. The coefficient of performance of a Carnot refrigerator working between 30⁰C and 0⁰C is