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 minimum number of NAND gates used to construct an OR gate is
  2. The masses of three wires of copper are in the ratio 1:3:5 and lengths
  3. 540 g of ice at 0° C is mixed with 540 g of water at 80° C. The final temperature
  4. A radiation of energy ‘E’ falls normally on a perfectly reflecting surface
  5. A drum of radius R and mass M, rolls down without slipping along an inclined plane