Given below are two statements : one is labelled as Assertion A and the other is labelled as Reason R.
Question:
Given below are two statements : one is labelled as Assertion A and the other is labelled as Reason R.
Assertion A : For a simple microscope, the angular size of the object equals the angular size of the image.
Reason R : Magnification is achieved as the small object can be kept much closer to the eye than $25 \mathrm{~cm}$ and hence it subtends a large angle. In the light of the above statements, choose the most appropriate answer from the options given below :
Correct Option: , 3
Solution:
$\theta^{\prime}=\frac{\mathrm{h}}{\mathrm{u}_{0}} ; \theta^{\prime}$ is same for both object and image
$\mathrm{m}=\frac{\theta^{\prime}}{\theta}=\frac{\mathrm{D}}{\mu_{0}}$
$\mathrm{u}_{0}<\mathrm{D}$
Hence $m>1$