Civil Engineering - Surveying - Discussion
Discussion Forum : Surveying - Section 5 (Q.No. 50)
50.
The Huygen's telescope eye piece
Discussion:
2 comments Page 1 of 1.
TseRing said:
3 months ago
D is the answer. The correct answer is: neither (a) nor (b).
Explanation:
Aplanatic means it corrects for spherical aberration and coma.
Achromatic means it corrects for chromatic (colour) aberration.
The Huygens eyepiece is not aplanatic and not fully achromatic, though it reduces some chromatic aberration compared to a single lens. So it doesn't meet the full definition of either.
Answer: Neither (a) nor (b).
Explanation:
Aplanatic means it corrects for spherical aberration and coma.
Achromatic means it corrects for chromatic (colour) aberration.
The Huygens eyepiece is not aplanatic and not fully achromatic, though it reduces some chromatic aberration compared to a single lens. So it doesn't meet the full definition of either.
Answer: Neither (a) nor (b).
Surya said:
6 years ago
achromatic is not satisfied then how?
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