Wave Nature of Light, wave front
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WAVE OPTICS

283117 In Huygen's eyepiece

1 The cross wires are outside the eyepiece
2 Condition for achromatism is satisfied
3 Condition for minimum spherical aberration is not satisfied
4 The image formed by the objective is a virtual image
EAMCET-2007
WAVE OPTICS

283118 Assertion (A) : Using Huygens eye-piece measurements can be taken but are not correct. Reason (R) : The cross wires. Scale and final image a re not magnified proportionately because the image of the object is magnified by two lenses, whereas the cross wire scale is magnified by one lens only.
Identify the correct one of the following.

1 Both (A) and (R) are true. (R) explains (A).
2 Both (A) and (R) are true. but (R) cannot explains (A).
3 Only (A) is correct, but (R) is wrong.
4 Both (A) and (R) are wrong.
EAMCET-2008
NEET DIGITAL LIBRARY
WAVE OPTICS

283117 In Huygen's eyepiece

1 The cross wires are outside the eyepiece
2 Condition for achromatism is satisfied
3 Condition for minimum spherical aberration is not satisfied
4 The image formed by the objective is a virtual image
EAMCET-2007
WAVE OPTICS

283118 Assertion (A) : Using Huygens eye-piece measurements can be taken but are not correct. Reason (R) : The cross wires. Scale and final image a re not magnified proportionately because the image of the object is magnified by two lenses, whereas the cross wire scale is magnified by one lens only.
Identify the correct one of the following.

1 Both (A) and (R) are true. (R) explains (A).
2 Both (A) and (R) are true. but (R) cannot explains (A).
3 Only (A) is correct, but (R) is wrong.
4 Both (A) and (R) are wrong.
EAMCET-2008
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