COMEDK · Physics · 25. Ray Optics
The radius of curvature of the curved surface of a plano-convex lens is 60 cm . If refractive index of the material of prism is 1.6 , then focal length of the lens is
- A 100 cm
- B 80 cm
- C 60 cm
- D 120 cm
Answer & Solution
Correct Answer
(A) 100 cm
Step-by-step Solution
Detailed explanation
Given, refractive index of plano convex lens, \(\mu=1.6\) Radius of curvature, \(R_1=60 \mathrm{~cm}\) By lens Maker's formula, focal length is given by…
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
- A light rod of length 1 m is suspended from ceiling horizontally by means of two vertical wires of equal length tied to its ends. One of the wires is made of material X and is of cross-section \(0.1\ \text{cm}^2\) and the other of material Y of cross-section \(0.3\ \text{cm}^2\). A weight is hung from the wire at a point to produce equal strain in the wires. The ratio of Young's moduli of wires A to B is 3:1. The location of the point from one end of the wire isCOMEDK 2026 Medium
- A policeman on duty detects a drop of \(15 \%\) in the pitch of the horn of a motor car as it crosses him. If the velocity of sound is \(330 \mathrm{~ms}^{-1}\), then calculate the speed of the car.COMEDK 2014 Medium
- If the ratio of the nuclear radii of two atoms is 2:3 then the ratio of their mass numbers is:COMEDK 2026 Easy
- In a single slit diffraction experiment, for slit width '\(\alpha\)' the width of the central maxima is '\(\beta\)'. If we double the slit width then the corresponding width of the central maxima will be:COMEDK 2024 Easy
- When a biconvex lens of glass of refractive index 1.5 is dipped in a liquid, it acts like a plane sheet of paper.
This means the refractive index of the liquid isCOMEDK 2024 Easy - One end of the string of length \(l\) is connected to a particle of mass \(m\) and the other end is connected to a small peg on a smooth horizontal table. If the particle moves in circle with speed \(v\), the net force on the particle (directed towards centre) will be ( \(T\) represents the tension in the string)COMEDK 2023 Easy
More PYQs from COMEDK
- In the synthesis of NH\(_3\) from H\(_2\) and N\(_2\), if \(6 \times 10^{-2}\) mole of hydrogen disappears in 10 minutes, the number of moles of NH\(_3\) formed in 0.3 minutes is:COMEDK 2026 Medium
- LCD stands forCOMEDK 2012 Easy
- Which of the following does not conduct electricity?COMEDK 2018 Easy
- The direction ratios of the vector \((\hat{i} + \hat{j}) \times (\hat{j} + \hat{k})\) areCOMEDK 2026 Easy
- The coordination number of sodium chloride isCOMEDK 2019 Easy
- The initial pressure of the system before decomposition for a first order gas phase reaction \(A_{(g)} \rightarrow B_{(g)} + C_{(g)}\) was \(P_i\). After lapse of time 't', total pressure of the system increased by 'x' units and became \(P_t\). The rate constant 'k' for the reaction is given as:COMEDK 2026 Medium