The focal length of the field lens (which is an achromatic combination of two lenses) of telescope is . The dispersive powers of the two lenses in the combination are 0.024 and 0.036. The focal lengths of two lenses are |
|||||||

a) |
30 and |
b) |
30 and |
c) |
45 and |
d) |
15 and |

The focal length of the field lens (which is an achromatic combination of two lenses) of telescope is . The dispersive powers of the two lenses in the combination are 0.024 and 0.036. The focal lengths of two lenses are |
|||||||

a) |
30 and |
b) |
30 and |
c) |
45 and |
d) |
15 and |

1 Answer

5876 Votes

3537

For achromatic combination and Solving above equations we get |

and are focal lengths of objective and eyepiece respectively of the telescope. The angular magnification for the given telescope is equal to |
|||||||

a) |
b) |
c) |
d) |

We hope we have given the updated helpful answer / content for your query in an easily accessible format to help you in preparing adequately. We do offer free support materials, 11th maths guide 11th maths guide 12th maths guide 10th maths guide, also for all the classes books and guide to all the students who sign up for SaraNextGen. Apart from traditional textbook queries, we've got conjointly provided further high order level thinking issues, that are seemingly to be expected in boards and competitive exams. It includes conceptual queries, MCQs, Long and short answer type queries, etc. These Questions are designed to learn each student and academics by providing chapter-wise further issues focusing totally on testing conceptual information with applications. Here, we've got provided a number of the necessary ways in which within which the solutions of all the Questions will profit students of class 1 to 12. If you have any queries, drop a message to us and we will get back to you at the earliest.