a person with normal near point 25cm using a compound microscope with objective of focal length 8 mm and an eyepiece of focal length 2.5 CM can bring an object at 9 mm from the objective in same focus separation between the two lenses calculate the magnifying power
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Answer:
Given :
d=25cm
f0=8.0mm=0.8cm
fe=2.5cm
u0=−9.0mm
=−0.9cm
1ve−1ue=1fe
=> 1ue=1ve−1fe
=1−25−12.5
=−1−1025
=1125
ue=−2511
=−2.27cm
Also, 1v0−1u0=1f0
1v0=1f0+1v0
=10.8+1−0.9
=0.9−0.80.72
=7.2cm
Seperation between two lenses =|ue|+v0=2.27+7.2=9.47cm
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