MCQ
In a simple microscope, if the final image is located at infinity then its magnifying power is
  • $\frac{{25}}{f}$
  • B
    $\frac{D}{{26}}$
  • C
    $\frac{f}{{25}}$
  • D
    $\frac{f}{{D + 1}}$

Answer

Correct option: A.
$\frac{{25}}{f}$
a
( a)$\frac{D}{F}$ or $\frac{{25}}{F}$

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 body is in equilibrium under the action of three coplanar forces $P, Q$ and $R$ as shown in the figure. Select the correct statement
A beam of natural light falls on a system of $6$ polaroids, which are arranged in succession such that each polaroid is turned through $30^o $ with respect to the preceding one. The percentage of incident intensity that passes through the system will be....$\%$
The intensity of light from a source is $\left( {\frac{{500}}{\pi }} \right)W/{m^2}$ . Find the amplitude of electric field in this wave
On each side of a polygon of $n$ sides a capacitor of capacitance $C$ is placed as shown in figure. Equivalent capacitance across $A$ and $B$ is
In Guericke's experiment to show the effect of atmospheric pressure, two copper hemispheres were tightly fitted to each other to form a hollow sphere and the air from the sphere was pumped out to create vacuum inside. If the radius of each hemisphere is $R$ and the atmospheric pressure is $p$, then the minimum force required (when the two hemispheres are pulled apart by the same force) to separate the hemispheres is
A man is at rest in the middle of a pond on perfectly smooth ice. He can get himself to the shore by making use of Newton's
If the decay or disintegration constant of a radioactive substance is $\beta $, then its half life and mean life are respectively 

$(log_e \,2 =ln\, 2)$

If a positive ion is moving, away from an observer with same acceleration, then the lines of force of magnetic induction will be
A nucleus with mass number $220$ initially at rest emits an  $\alpha$-particle. If the $Q$ value of the reaction is $5.5\, MeV$, calculate the kinetic energy of the $\alpha$-particle ............ $MeV$
In a Young's double slit experiment, the intensity of light at each slit is $I_0$. Interference pattern is observed along a direction parallel to the line $S_1 S_2$ on screen $S$. The minimum, maximum and the intensity averaged over the entire screen are respectively.