CBSE Class 12 Sample Paper for 2022 Boards [Term 2] - Physics
Question 8 (Choice 1) - CBSE Class 12 Sample Paper for 2022 Boards [Term 2] - Physics - Solutions to CBSE Sample Paper - Physics Class 12
Last updated at April 16, 2024 by Teachoo
(a) Draw a ray diagram of a compound microscope for the final image formed at least distance of distinct vision?
Answer
Diagram of Compound Microscope for the final image formed at D
(b) An angular magnification of 30X is desired using an objective of focal length 1.25 cm and an eye piece of focal length 5 cm. How will you set up the compound microscope for the final image formed at least distance of distinct vision?
Question 8 (b) (Choice 1)
An angular magnification of 30X is desired using an objective of focal length 1.25 cm and an eye piece of focal length 5 cm. How will you set up the compound microscope for the final image formed at least distance of distinct vision?
π_0=30,π_0=1.25 ππ,π_π=5 ππ
When image is formed at least distance of distinct vision
D = 25 cm
Angular magnification of eyepiece
π_π=(1+π·/π_π )=1+25/5=6
Total Angular magnification,
π=π_π π_π
π_π=π/π_π =30/6=5
As the objective lens forms the real image,
π_π= π£_π/π’_π =β5
π£_π=β5π’_π
Using lens equation,
π’_π=β1.5 ππ
π£_π=β5Γ(β1.5)ππ
=7.5 ππ
Given π_π=βπ·=25 ππ, π_π=+5 ππ, π’_π= ?
using again lens equation π’_π=25/6
Thus, object is to be placed at 1.5 cm from the objective and separation between the two lenses should be
πΏ=π£_π+πΌπ’_π
π°=ππ.ππ cm
Made by
Davneet Singh
Davneet Singh has done his B.Tech from Indian Institute of Technology, Kanpur. He has been teaching from the past 14 years. He provides courses for Maths, Science, Social Science, Physics, Chemistry, Computer Science at Teachoo.
Hi, it looks like you're using AdBlock :(
Displaying ads are our only source of revenue. To help Teachoo create more content, and view the ad-free version of Teachooo... please purchase Teachoo Black subscription.
Please login to view more pages. It's free :)
Teachoo gives you a better experience when you're logged in. Please login :)
Solve all your doubts with Teachoo Black!
Teachoo answers all your questions if you are a Black user!