Optics Question 32
Question: Assertion : If objective and eye lenses of a microscope are interchanged then it can work as telescope. Reason : The objective of telescope has small focal length.
Options:
A) If both assertion and reason are true and the reason is the correct explanation of the assertion.
B) If both assertion and reason are true but reason is not the correct explanation of the assertion.
C) If assertion is true but reason is false.
D) If the assertion and reason both are false.
E) If assertion is false but reason is true.
Show Answer
Answer:
Correct Answer: D
Solution:
We cannot interchange the objective and eye lens of a microscope to make a telescope.
The reason is that the focal length of lenses in microscope are very small, of the order of mm or a few cm and the difference (fo - fe) is very small, while the telescope objective have a very large focal length as compared to eye lens of microscope.
