Check sibling questions

(a) Draw a ray diagram of a compound microscope for the final image formed at least distance of distinct vision?Β 

Answer

Diagram of Compound Microscope for the final image formed at D

RAY DIAGRAM - COMPOUND MICROSCOPE- FINAL IMAGE AT D.jpg

(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?Β 

Answer

Slide8.JPG

Slide9.JPG Slide10.JPG

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Transcript

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‘š_0=30,𝑓_0=1.25 π‘π‘š,𝑓_𝑒=5 π‘π‘š When image is formed at least distance of distinct vision D = 25 cm Angular magnification of eyepiece π‘š_𝑒=(1+𝐷/𝑓_𝑒 )=1+25/5=6 Total Angular magnification, π‘š=π‘š_π‘œ π‘š_𝑒 π‘š_π‘œ=π‘š/π‘š_𝑒 =30/6=5 As the objective lens forms the real image, π‘š_π‘œ= 𝑣_π‘œ/𝑒_π‘œ =βˆ’5 𝑣_π‘œ=βˆ’5𝑒_π‘œ Using lens equation, 𝑒_π‘œ=βˆ’1.5 π‘π‘š 𝑣_π‘œ=βˆ’5Γ—(βˆ’1.5)π‘π‘š =7.5 π‘π‘š Given 𝑉_𝑒=βˆ’π·=25 π‘π‘š, 𝑓_𝑒=+5 π‘π‘š, 𝑒_𝑒= ? using again lens equation 𝑒_𝑒=25/6 Thus, object is to be placed at 1.5 cm from the objective and separation between the two lenses should be 𝐿=𝑣_π‘œ+𝐼𝑒_𝑒 𝑰=𝟏𝟏.πŸ”πŸ• cm

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Davneet Singh

Davneet Singh has done his B.Tech from Indian Institute of Technology, Kanpur. He has been teaching from the past 12 years. He provides courses for Maths, Science, Social Science, Physics, Chemistry, Computer Science at Teachoo.