MCQ
The magnifying power of a telescope can be increased by
  • A
    Increasing focal length of the system
  • Fitting eye piece of high power
  • C
    Fitting eye piece of low power
  • D
    Increasing the distance of objects

Answer

Correct option: B.
Fitting eye piece of high power
Magnifying power of telescope is $\frac{f_o}{f_e}$, so as $\frac{1}{f_e}$ increases, magnifying power increases.

Need a full question paper?

Generate a complete, print-ready paper with questions like this in minutes — across 16+ boards, with answer keys.

Start Generating Free

Similar questions

A closed hollow insulated cylinder is filled with gas at $0^{\circ} \mathrm{C}$ and also contains an insulated piston of negligible weight and negligible thickness at the middle point. The gas on one side of the piston is heated to $100^{\circ} \mathrm{C}$. If the piston moves $5 \mathrm{~cm}$, the length of the hollow cylinder is
The decrease in the potential energy of a ball of mass $20 \mathrm{~kg}$ which falls from a height of $50 \mathrm{~cm}$ is
An $X$-ray tube is operating at $50 \mathrm{kV}$ and $20 \mathrm{~mA}$. The target material of the tube has a mass of $1.0 \mathrm{~kg}$ and specific heat $495 \mathrm{Jg}{ }^{\circ} \mathrm{C}^{-1}$. One percent of the supplied electric power is converted into $X$-rays and the entire remaining energy goes into heating the target Then
A person sees his virtual image by holding a mirror very close to the face. When he moves the mirror away from his face, the image becomes inverted. What type of mirror he is using
If the momentum of a body is increased $n$ times, its kinetic energy increases
Magnitude of vector which comes on addition of two vectors, $6 \hat{i}+7 \hat{j}$ and $3 \hat{i}+4 \hat{j}$ is
$\sigma_1$ and $\sigma_2$ are the electrical conductivities of $\mathrm{Ge}$ and $\mathrm{Na}$ respectively. If these substances are heated, then
An amplitude modulated wave is modulated to $50 \%$. What is the saving in power if carrier as well as one of the side bands are suppressed
A particle travels $10 m$ in first $5 sec$ and $10 m$ in next $3 sec$. Assuming constant acceleration what is the distance travelled in next $2 sec$
If $|\vec{A}-\vec{B}|=|\vec{A}|=|\vec{B}|$, the angle between $\vec{A}$ and $\vec{B}$ is