Two thin lenses of focal lengths f₁ and f₂ are in contact and coaxial.

Two Thin Lenses Of Focal Lengths F And F Are Physics Question

Two thin lenses of focal lengths f₁ and f₂ are in contact and coaxial. The power of the combination is:

Options

(a) √ f₁ / f₂
(b) √ f₂ / f₁
(c) f₁ + f₂ / 2
(d) f₁ + f₂ / f₁f₂

Correct Answer:

f₁ + f₂ / f₁f₂

Explanation:

The focal length of the combination
1/f = 1/f₁ + 1/f₂
Power of the combinations,
P = f₁ + f₂ / f₁ f₂ ( P = 1 / f )

Related Questions:

  1. Characteristic X-rays are produced due to
  2. The sun light reaches us as white and not as its components because
  3. A nucleus with mass number 220 initially at rest emits an α-particle. If the Q-value
  4. When three identical bulbs of 60 W-200 V rating are connected in series to a 200 V
  5. Two conducting spheres of radii 5 cm and 10 cm are given a charge of 15 μC each.

Topics: Ray Optics (94)
Subject: Physics (2479)

Important MCQs Based on Medical Entrance Examinations To Improve Your NEET Score

18000+ students are using NEETLab to improve their score. What about you?

Solve Previous Year MCQs, Mock Tests, Topicwise Practice Tests, Identify Weak Topics, Formula Flash cards and much more is available in NEETLab Android App to improve your NEET score.

NEETLab Mobile App

Share this page with your friends

Be the first to comment

Leave a Reply

Your email address will not be published.


*