AP EAMCET · PHYSICS · Ray Optics
If the far point of a short sighted person is 400 cm, then the power of the lens required to enable him to see very distant objects clearly is
- A \(-0.5 \mathrm{D}\)
- B \(+0.5 \mathrm{D}\)
- C \(+0.25 \mathrm{D}\)
- D \(-0.25 \mathrm{D}\)
Answer & Solution
Correct Answer
(D) \(-0.25 \mathrm{D}\)
Step-by-step Solution
Detailed explanation
\( v = -400 \text{ cm} = -4 \text{ m} \) \( P = \frac{1}{f} = \frac{1}{v} - \frac{1}{u} = \frac{1}{-4 \text{ m}} - \frac{1}{-\infty} \) \( P = -\frac{1}{4} \text{ D} = -0.25 \text{ D} \)
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
- The energies required to set up in a cube of side \(10 \mathrm{~cm}\)
(i) a uniform electric field of \(10^7 \mathrm{Vm}^{-1}\) and
(ii) a uniform magnetic field of \(0.25 \mathrm{Wbm}^{-2}\) are respectively about
\[
\left(\mu_0=4 \pi \times 10^{-7} \mathrm{Hm}^{-1}, \varepsilon_0=8.9 \times 10^{-12} \mathrm{Fm}^{-1}\right)
\]AP EAMCET 2018 Medium - When a piece of a magnetic substance is put in a uniform magnetic field, the flux density inside it is four times the flux density away from the piece. The magnetic permeability of the material isAP EAMCET 2021 Medium
- The capacitance of a spherical condenser is \(1 \mu \mathrm{F}\). If the spacing between the two spheres is \(1 \mathrm{~mm}\), the radius of the outer sphere isAP EAMCET 2020 Easy
- A solenoid has the length \(1 \mathrm{~m}\) and the area of cross-section \(0.02 \mathrm{~m}^2\). If number of turns in the solenoid is \(\mathbf{5 0 0 0}\) then the self inductance of the solenoid isAP EAMCET 2022 Easy
- A ball is falling freely from a height. When it reaches \(10 \mathrm{~m}\) height from the ground its velocity is \(v_0\). It collides with the ground and loses \(50 \%\) of its energy and rises back to height of \(10 \mathrm{~m}\). Then the velocity \(v_0\) isAP EAMCET 2010 Medium
- Potential energy between a proton and an electron is given by , then radius of Bohr's orbit can be given byAP EAMCET 2021 Hard
More PYQs from AP EAMCET
- If \(\tan \theta+\tan 2 \theta+\sqrt{3} \tan \theta \tan 2 \theta=\sqrt{3}\), then the general values of \(\theta\) areAP EAMCET 2019 Easy
- If \(\mathrm{a}, \mathrm{b}, \mathrm{c}\) are the intercepts made by the plane passing through the point \((1,2,3)\) parallel to the plane \(3 \mathrm{x}+4 \mathrm{y}-5 \mathrm{z}=0\) on \(\mathrm{X}, \mathrm{Y}, \mathrm{Z}\)-axes respectively then \(3 \mathrm{a}+\mathrm{b}+5 \mathrm{c}=\)AP EAMCET 2022 Medium
- [.] represents greatest integer function. Let \(g(x)=1+x-[x]\) and \(f(x)=\left\{\begin{array}{cl}-3, & x < 0 \\ 0, & x=0, \text { then } \\ 5, & x>0\end{array}\right.\) \(f(g(x))\) isAP EAMCET 2021 Medium
- If \(\cos \alpha+\cos \beta=\frac{1}{3}\) and \(\sin \alpha+\sin \beta=\frac{1}{4}\), then \(\cos (\alpha+\beta)=\)AP EAMCET 2023 Medium
- Relatively which conditions favour the faster Brownian movement of colloidal particles in solution?AP EAMCET 2022 Easy
- The lines \(3 x^2+8 x y-3 y^2+2 x-4 y-1=0\) and \(4 x-3 y-2=0\)AP EAMCET 2017 Medium