enEnglishguગુજરાતી
NEET · Physics · STD 12 - 9. Ray optics and optical instruments
An equiconvex lens has power \(\mathrm{P}\). It is cut into two symmetrical halves by a plane containing the principal axis The power of one part will be
- A \(0\)
- B \(\frac P2\)
- C \(\frac P4\)
- D \(P\)
Answer & Solution
Correct Answer
(D) \(P\)
Step-by-step Solution
Detailed explanation
Focal length do not change \(\rightarrow\) Power do not change
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 submarine is designed to withstand an absolute pressure of 100 atm. How deep can it go below the water surface ?
(Consider the density of water \(=1000 kg m ^{-3}, 1 atm=1 \times 10^5 Pa\) and gravitational acceleration \(g=10 m / s ^2\) )NEET 2026 Medium - Suppose the charge of a proton and an electron differ slightly. One of them is \(-e,\) the other is \((e + \Delta e).\) If the net of electrostatic force and gravitational force between two hydrogen atoms placed at a distanced (much greater than atomic size) apart is zero, then \(\Delta e\) is of the order of \([\) Given: mass of hydrogen \(m_h = 1.67 \times 10^{- 27}\,\, kg]\)NEET 2017 Hard
- For a travelling harmonic wave \(y(x, t)=2.0 \cos 2 \pi(10 t-0.0080 x+0.35)\), where x and y are in cm and t in s. The phase difference between oscillatory motion of two points separated by a distance of 0.5 m is :NEET 2026 Easy
- The moment of inertia of a thin rod about an axis passing through its mid point and perpendicular to the rod is \(2400 \mathrm{~g} \mathrm{~cm}^2\). The length of the \(400 \mathrm{~g}\) rod is nearly:NEET 2024 Medium
- A solld cylinder of mass \(2 \;\mathrm{kg}\) and radius \(50 \;\mathrm{cm}\) rolls up an inclined plane of angle inclination \(30^{\circ}\). The centre of mass of cyllnder has speed of \(4 \;\mathrm{m} / \mathrm{s}\). The distance travelled by the cyllinder on the incline surface will be ......\(m\)NEET 2019 Medium
- An electric dipole is placed at an angle of \(30^o \) with an electric field intensity \(2 \times \,\,10^5 \,\,NC^{-1}\) It experiences a torque equal to \(4\,\, N m.\) The charge on the dipole, if the dipole length is \(2\,\, cm,\) isNEET 2023 Medium
More PYQs from NEET
- Match List \(I\) with List \(II\) :
Choose the correct answer from the options given below :List \(I\) List \(II\) \(A.\) Pleurobrachia \(I.\) Mollusca \(B.\) Radula \(II.\) Ctenophora \(C.\) Stomochord \(III.\) Osteichthyes \(D.\) Air bladder \(IV.\) Hemichordata NEET 2024 Medium - Elimination reaction of \(2 -\)Bromo-pentane to form pent\(-2-\)ene is: \((a)\) \(\beta\) \(-\)Elimination reaction \((b)\) Follow Zaitsev rule \((c)\) Dehydrohalogenation reaction \((d)\) Dehydration reactionNEET 2020 Medium
- Which of the following is not a product of light reaction of photosynthesis?NEET 2018 Medium
- Photons with energy \(5\,\, eV\) are incident on a cathode \(C\) in a photoelectric cell. The maximum energy of emitted photoelectrons is \(2\,\, e V.\) When photons of energy \(6\,\, eV\) are incident on \(C,\) no photoelectrons will reach the anode \(A,\) if the stopping potential of \(A\) relative to \(C\) is ............ \(V\)NEET 2016 Medium
- Boric acid is an acid because its moleculeNEET 2016 Medium
- During a cloudy day, a primary and a secondary rainbow may be created, then the:NEET 2022 Easy