COMEDK · Physics · 25. Ray Optics
A symmetric double convex lens is cut into two equal parts by a plane perpendicular to the principal axis. If the power of the original lens is 4D, the difference between the powers of the original lens and the cut lens is
- A 2 D
- B D
- C zero
- D 3D
Answer & Solution
Correct Answer
(A) 2 D
Step-by-step Solution
Detailed explanation
The power \(P\) of a thin lens is given by the lens maker formula \(P = (\mu - 1) \left( \dfrac{1}{R_1} - \dfrac{1}{R_2} \right)\). For a symmetric double convex lens, \(R_1 = R\) and \(R_2 = -R\). Thus,…
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
- If \(\mu_{0}\) is permeability of free space and \(\varepsilon_{0}\) is permittivity of free space, then the speed of light in vacuum is given byCOMEDK 2018 Easy
- \(\text { In a p-n junction, the depletion layer of thickness } 1 \mu \mathrm{m} \text { has } 0.05 \mathrm{~V} \text { potential across it. The electric field in } N C^{-1} \text { is }\)COMEDK 2024 Easy
- A short bar magnet placed with its axis at \(45^{\circ}\) with an external field of \(400 \times 10^{-4} \mathrm{~T}\) experiences a torque of 0.024 Nm . If a solenoid of cross-sectional area \(10^{-4} \mathrm{~m}^2\) and 500 turns replaces the short bar magnet such that they have the same magnetic moment, then the current flowing through the solenoid is:COMEDK 2025 Medium
- A body under the action of a force \(\mathbf{F}=6 \hat{\mathbf{i}}-8 \hat{\mathbf{j}}+10 \hat{\mathbf{k}}\), acquires an acceleration of \(1 \mathrm{~m} / \mathrm{s}^{2}\). The mass of this body must beCOMEDK 2020 Easy
- An object is dropped from a certain point A at a height 'h' from the ground. During it's journey straight downwards, the object passes points B and C such that the ratio of time taken \(t_1\) to cover AB and \(t_2\) to cover BC is 1: \((\sqrt{2} - 1)\). What is the ratio of distances AB:BC ?COMEDK 2026 Medium
- A bar magnet is equivalent toCOMEDK 2013 Easy
More PYQs from COMEDK
- The maximum value of \(x+y\) subjected to \(2 x+3 y \leq 12, x y \geq 0\)COMEDK 2024 Easy
- Bohr's radius of 2 nd orbit of \(\mathrm{Be}^{3+}\) is equal to that ofCOMEDK 2023 Medium
- If \(\frac{3 x^{2}-2 x+4}{(x-1)^{6}}=\frac{A_{1}}{x+1}+\frac{A_{2}}{(x+1)^{2}}+\frac{A_{3}}{(x+1)^{3}}\) \(+\frac{A_{4}}{(x+1)^{4}}+\frac{A_{5}}{(x+1)^{5}}+\frac{A_{6}}{(x+1)^{6}}\), then \(\left(A_{1}+A_{2}+A_{2}-A_{4}-A_{6}\right)=\)COMEDK 2018 Hard
- The pH at which an acid indicator with \(K_\alpha=1 \times 10^{-5}\) changes colour when the indicator concentration is \(1 \times 10^{-3} \mathrm{M}\) isCOMEDK 2024 Easy
- When the combustion of one molecule of liquid heptane is carried out at a constant temperature ' \(T\) ', the difference between \(\Delta H^o\) and \(\Delta U^o\) is equal to:COMEDK 2025 Medium
- For the reaction, \(2 \mathrm{HI}(g) \rightleftharpoons \mathrm{H}_{2}(g)+\mathrm{I}_{2}(g) ;-Q \mathrm{~kJ}\), the equilibrium constant depends uponCOMEDK 2017 Medium