Home
Class 12
PHYSICS
A convex lens of focal length 25 cm is p...

A convex lens of focal length `25 cm` is placed co-axially in contact with a concave lens of focal length `20 cm`. Determine the power of the combination. Will the system be converging or diverging in nature ?

Text Solution

Verified by Experts

It's nature is convergilng.
Power of convex lens, `P_(1) =(100)/(20)=5D,`
Power of concave lens, `P_(2)=(-100)/(25)= -4D`
Power of the combination, `P = P_(1)+P_(2)= +1D.`
Promotional Banner

Topper's Solved these Questions

  • XII BOARDS

    XII BOARDS PREVIOUS YEAR|Exercise SET - III (Delhi Board)|8 Videos

  • XII BOARDS

    XII BOARDS PREVIOUS YEAR|Exercise [SET - I]|32 Videos

  • XII BOARDS

    XII BOARDS PREVIOUS YEAR|Exercise SET - I|30 Videos

  • SAMPLE PAPER 2019

    XII BOARDS PREVIOUS YEAR|Exercise SECTION D|6 Videos

Similar Questions

Explore conceptually related problems

A convex lens of focal length 30 cm is placed coaxially in contact with a concave lens of focal length 40 cm. Determine the power of the combination. Will the system be converging or diverging in nature?

A convex lens of focal length 20 cm is placed in contact with a concave lens of focal length 10 cm. What is the focal length and power of the combination ?

A convex lens of focal length 10 cm is placed in contact with a concave lens of focal length 20 cm. The focal length of this combination of lenses will be:

A convex lens of focal length 25 cm is kept is contact with a concave lens of focal length 40 cm. What is the power of their combination ?

A convex lens of focal length 40 cm is in contact with a concave lens of focal length 25 cm. The power of the combination is

A convex lens of focal length 40cm is in contact with a concave lens of focal length 25cm. The power of the combination is

A convex lens of focal length 84 cm is in contact with a concave lens of focal length 12 cm . The power of combination (in diopters) is

A convex lens of focal length 10.0 cm is placed in contact with a convex lens of 15.0 cm focal length. What is the focal length of the combination ?

A convex lens of Focal length of 40cm is in contact with a concave lens of focal length 25cm. The power of the combination is.