KCET · Physics · Ray Optics
Two thin plano-convex lenses each of focal length \(f\) are placed as shown in the figure. The ratio of their effective focal lengths in the three cases is
- A \(3: 2: 1\)
- B \(1: 2: 3\)
- C \(1: 2: 1\)
- D \(1: 1: 1\)
Answer & Solution
Correct Answer
(D) \(1: 1: 1\)
Step-by-step Solution
Detailed explanation
Effective focal length in each case is given by
\[
\frac{1}{F}=\frac{1}{f}+\frac{1}{f} \quad \text { or } \quad F=\frac{f}{2}
\]
\[
\frac{1}{F}=\frac{1}{f}+\frac{1}{f} \quad \text { or } \quad F=\frac{f}{2}
\]
See the Complete Solution
Get step-by-step explanations for this and 2.5 Lakh+ more JEE, NEET & CET questions.
- Unlock all solutions
- Practice the full chapter
- Track accuracy across PYQs
4.8 rated on Google Play · 14,000+ reviews
More questions from Physics
- Two particles of masses \( m_{1} \) and \( m_{2} \) have equal kinetic energies. The ratio of their momentum isKCET 2018 Easy
- The ratio of molar specific heats of oxygen isKCET 2024 Easy
- In Faraday-Henry's experiment, a coil is connected to a galvanometer. For the deflection of pointer in the galvanometer, which of the following statement/s is/are WRONG?
The pointer in the galvanometer deflects -
(a) When the bar magnet is moved towards the stationary coil along its axis.
(b) When the bar magnet is moved away from the stationary coil along its axis.
(c) When the coil is moved towards the stationary bar magnet along its axis.
(d) When the coil and the magnet are moved without relative motion between them.KCET 2026 Easy - The output of given logic circuit is
KCET 2011 Medium -
In the above circuit the current in each resistance is:KCET 2009 Hard - The magnetic field at the origin due to a current element \(i d \mathbf{l}\) placed at a point with vector position \(\mathbf{r}\) isKCET 2020 Easy
More PYQs from KCET
- The appearance of chancre, rashes all over the body are the symptoms ofKCET 2013 Easy
- In a 3.2 Kbp long piece of DNA, 820 adenine bases were found. What would be the number of cytosine bases?KCET 2015 Hard
- A charged particle with a velocity \(2 \times 10^{3} \mathrm{~ms}^{-1}\) passes undeflected through electric field and magnetic fields in mutually perpendicular directions. The magnetic field is \(1.5 \mathrm{~T}\). The magnitude of electric field will beKCET 2013 Medium
- For light diverging from a finite point source,KCET 2022 Easy
- Match the content of List I with List II:
Choose the correct option from the following:List I List II 1. Polyembryony p. Black pepper 2. Perisperm q. Banana 3. False fruit r. Lemon 4. Parthenocarpy s. Apple KCET 2024 Easy - In Young's double slit experiment, the distance between the slits and the screen is \(1.2 \mathrm{~m}\) and the distance between the two slits is \(2.4 \mathrm{~mm}\). If a thin transparent mica sheet of thickness \(1 \mu \mathrm{m}\) and RI \(1.5\) is introduced between one of the interfering beams, the shift in the position of central bright fringe isKCET 2020 Easy