MHT CET · Physics · Ray Optics
The figure shows equiconvex lens of focal length ' \(\mathrm{f}\) '. If the lens is cut along \(\mathrm{AB}\), the
focal length of each half will be
- A \(2 \mathrm{f}\)
- B \(\mathrm{f}\)
- C \(3 \mathrm{f}\)
- D \(4 \mathrm{f}\)
Answer & Solution
Correct Answer
(A) \(2 \mathrm{f}\)
Step-by-step Solution
Detailed explanation
\( \frac{1}{\mathrm{f}} = (\mu - 1) \left( \frac{1}{\mathrm{R}} - \frac{1}{-\mathrm{R}} \right) = (\mu - 1) \frac{2}{\mathrm{R}} \) \( \frac{1}{\mathrm{f}'} = (\mu - 1) \left( \frac{1}{\mathrm{R}} - \frac{1}{\infty} \right) = (\mu - 1) \frac{1}{\mathrm{R}} \)
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
- In the common emitter mode of a transistor when the collector emitter voltage is changed by \(0.4 \mathrm{~V}\), the collector current changes by \(0.04 \mathrm{~mA}\). The output resistance isMHT CET 2022 Easy
- A particle starts oscillating simple harmonically from its equilibrium position with time period 'T'. What is the ratio of potential energy to kinetic energy of the particle at time \(t=\frac{T}{12}\) ?
\(\left(\sin \left(\frac{\pi}{6}\right)=\frac{1}{2}\right)\)MHT CET 2024 Hard - When the two inputs of a NAND gate are shorted, the resulting gate isMHT CET 2008 Medium
- In an adiabatic expansion of a gas initial and final temperatures are \(T_1\) and \(T_2\) respectively then the change in internal energy of the gas is \(
\text { [R = gas constant, } \mathrm{Y}=\text { adiabatic ratio }]
\)MHT CET 2022 Easy - The displacement of the particle executing linear S.H.M. is \(\mathrm{x}=0.25 \mathrm{sin}(11 \mathrm{t}+0.5) \mathrm{m}\). The period of S.H.M. is \(\left(\pi=\frac{22}{7}\right)\)MHT CET 2020 Easy
- A body performing simple harmonic motion has potential energy '\(\mathrm{P}_{1}\)' at displacement ' \(x_{1}\) '. Its potential energy is ' \(\mathrm{P}_{2}\) ' at displacement ' \(x_{2}\) '. The potential energy 'P' at displacement \(\left(x_{1}+x_{2}\right)\) isMHT CET 2020 Medium
More PYQs from MHT CET
- A massless square loop of wire of resistance ' \(R\) ' supporting a mass ' M ' hangs vertically with one of its sides in a uniform magnetic field ' \(B\) ' directed outwards in the shaded region. A d.c. voltage ' V ' is applied to the loop. For what value of ' \(V\) ' the magnetic force will exactly balance the weight of the supporting mass ' \(M\) '? (side of loop \(=\mathrm{L}, \mathrm{g}=\) acceleration due to gravity)
MHT CET 2024 Medium - Direction cosines of the line are _______MHT CET 2016 Easy
- The value of \(\cos \left(2 \cos ^{-1} x+\sin ^{-1} x\right)\) at \(x=\frac{1}{5}\) isMHT CET 2024 Easy
- \(\int_{-5}^{5} \log \left(\frac{7-x}{7+x}\right) d x=\)MHT CET 2020 Easy
- Fuelgen showed that DNA is present in ________.MHT CET 2025 Hard
- In Young's double slit experiment, in an interference pattern, second minimum is observed exactly in front of one slit. The distance between the two coherent sources is ' \(d\) ' and the distance between the source and screen is ' \(D\) '. The wave length of light \((\lambda)\) used isMHT CET 2024 Easy