COMEDK · Physics · 25. Ray Optics
Convex lens of focal length \(f\) made of glass of refractive index \(1.5\) is immersed in water of refractive index \(4 / 3\). Focal length is
- A \(f\)
- B greater than \(f\)
- C less than \(f\)
- D \(-f\)
Answer & Solution
Correct Answer
(B) greater than \(f\)
Step-by-step Solution
Detailed explanation
Given, \(\mu_{g}=1.5, \mu_{w}=\frac{4}{3}\) From lens Maker's formula,…
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 units of mass, length and gravitational constant are chosen to fundamental units, the dimensions of time would beCOMEDK 2024 Medium
- A car, starting from rest, accelerates at a rate of \(\beta\) through a distance S, then continues at constant speed for time t and then decelerates at a rate of \(\dfrac{\beta}{2}\) to come to rest. If the total distance travelled is \(10\ S\), then ratio \(\dfrac{S}{t^2}\) isCOMEDK 2026 Medium
- A rectangular coil of \(300\) turns has an average area of \(25 \mathrm{~cm} \times 10 \mathrm{~cm}\). The coil rotates with a speed of \(50 \mathrm{~cps}\) in uniform magnetic field of strength \(4 \times 10^{-2} \mathrm{~T}\) about an axis perpendicular to the field. The peak value of the induced emf \((\) in \(\mathrm{V})\) isCOMEDK 2013 Hard
- An electron moves with speed of \(2 \times 10^{5} \mathrm{~m} / \mathrm{s}\) along the positive \(x\)-direction in a magnetic field \(\mathbf{B}=(\hat{\mathbf{i}}-4 \hat{\mathbf{j}}-3 \hat{\mathbf{k}}) \mathrm{T}\). The magnitude of the force (in N) experienced by the electron isCOMEDK 2020 Medium
- For a polar molecule, which of the following statements is true?COMEDK 2014 Medium
- A particle is projected at an angle \(30^{\circ}\) with horizontal having kinetic energy \(K\). The kinetic energy of the particle at highest point is.COMEDK 2023 Easy
More PYQs from COMEDK
- Two simple harmonic motions are represented by equations \(y_1=0.5 \sin \left[200 \pi t+\dfrac{\pi}{3}\right]\) and \(y_1=0.5 \cos \pi t\). The phase difference of the velocity of particle 1 with respect to the velocity of particle 2 is:COMEDK 2025 Medium
- If \(\log _{6} a+\log _{6} b+\log _{6} c=6\), where \(a, b\) and \(c\) are positive integers that form an increasing \(\mathrm{GP}\) and \(b-a\) is a square of an integer, then \(a+b+c=\)COMEDK 2017 Easy
- If \(\gamma\) is the ratio of specific heats and \(R\) is the universal gas constant, then the molar specific heat at constant volume \(C_{V}\) is given byCOMEDK 2018 Easy
- For a series \(L-C-R\) circuit at resonance, which statement is not true?COMEDK 2020 Easy
- Which one of the following is a second order reaction?COMEDK 2020 Medium
- \(\begin{aligned}
f(x) &=2 a-x \text { in }-a < x < a \\
&=3 x-2 a \text { in } a \geq x
\end{aligned}\)
Then which of the following is true?COMEDK 2019 Hard