TS EAMCET · Physics · Ray Optics
The limit of resolution of a telescope is \(25 \times 10^{-7} \mathrm{rad}\). If the telescope is used to detect light of wavelength \(500 \mathrm{~nm}\) coming from a star, the diameter of the objective lens used by telescope is
- A \(244 \mathrm{~cm}\)
- B \(258 \mathrm{~cm}\)
- C \(228 \mathrm{~cm}\)
- D \(264 \mathrm{~cm}\)
Answer & Solution
Correct Answer
(A) \(244 \mathrm{~cm}\)
Step-by-step Solution
Detailed explanation
Given, limit of resolution, \(\alpha=2.5 \times 10^{-7}\) rad. and wavelength, \(\lambda=500 \mathrm{~nm}\) As, limit of resolution of a telescope, So, \[ \alpha=\frac{1.22 \lambda}{a} \]…
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 steel rod has radius and length . It is stretched along its length with a force of . This causes an elongation of . Find the (approximate) Young's modulus of steel from this information.TS EAMCET 2018 Medium
- \(F_{\mathrm{pp}}, F_{\mathrm{nn}}\) and \(F_{\mathrm{np}}\) are the nuclear forces between proton-proton, neutron-neutron and neutron-proton respectively. Then relation between them isTS EAMCET 2008 Easy
- Consider the following statements A and B and identify the correct answer : A. Fresnel's diffraction pattern occurs when the source of light or the screen on which the diffraction pattern is seen or when both are at finite distance from the aperture. B. Diffracted light can be used 'to estimate the helical structure of nucleic acids.TS EAMCET 2004 Medium
- If \(E, M, J\) and \(G\) respectively denote energy, mass, angular momentum and universal gravitational constant, the quantity, which has the same dimensions as the dimensions of \(\frac{E J^2}{M^5 G^2}\)TS EAMCET 2013 Easy
- A radioactive nucleus can decay in two different processes with half life \(0.7 \mathrm{hr}\) and \(0.3 \mathrm{hr}\). The effective average life of the nucleus in minutes approximately is (value of \(\ln 2=0.7\) )TS EAMCET 2019 Medium
- A body of mass \(\mathrm{m}\) slides down along a frictionless inclined plane from height ' \(h\) ' and just completes motion in a vertical circle of radius \(2 \mathrm{~m}\) after reaching the bottom. What is the value of \(h\) ? [Use \(\left.\mathrm{g}=10 \mathrm{~m} / \mathrm{s}^2\right]\)TS EAMCET 2022 Medium
More PYQs from TS EAMCET
- Ball \(A\) of mass \(50 \mathrm{gm}\) and speed \(10 \mathrm{~m} / \mathrm{s}\) collides with other ball \(B\) of mass \(10 \mathrm{gm}\) and speed \(15 \mathrm{~m} / \mathrm{s}\) travelling in opposite direction with each other. Determine the final speed of ball \(B\), if the coefficient of restitution is \(\frac{2}{5}\).TS EAMCET 2019 Medium
- The shortest wavelength in Balmer series of hydrogen atom spectrum is approximately equal to (use \(\mathrm{R}_{\mathrm{H}}=1.097 \times 10^7 \mathrm{~m}^{-1}\) )TS EAMCET 2022 Easy
- Two blocks of equal masses are tied to the ends of a light string. The string passes over a mass less pulley fixed on frictionless surface as shown in the figure. The acceleration of the centre of mass of the blocks is ( \(g\) - acceleration due to gravity)
TS EAMCET 2023 Medium - A particle moves over a plane with a constant acceleration . At the time the velocity is The speed of the particle when it is displaced by parallel to the -axis is,TS EAMCET 2021 Medium
- Consider an ideal gas in a closed container at The container is then heated so that the average velocity of particles of the gas increases by a factor of What would be the final temperature?TS EAMCET 2021 Medium
- A thin convex lens of focal length \(f\) made of crown glass is immersed in a liquid of refractive index \(\mu_I\left(\mu_I>\mu_c\right)\), where \(\mu_c\) is the refractive index of the crown glass. The convex lens now isTS EAMCET 2016 Medium