AIIMS 2012
- Exam
- AIIMS
- Year
- 2012
- Subject
- Physics
- Chapter
- Ray Optics
AIIMS 2012 · Physics · Ray Optics
Assertion : The focal length of objective lens in telescope is much...
Assertion : The focal length of objective lens in telescope is much more than that of eye piece.Reason : Telescope has high resolving power due to large focal length.
Options
- AIf both assertion and reason are true and reason is the correct explanation of assertion.
- BIf both assertion and reason are true but reason is not the correct explanation of assertion.
- CIf assertion is true but reason is false.
- DIf both assertion and reason are false.
Correct answer
B. If both assertion and reason are true but reason is not the correct explanation of assertion.
Step-by-step solution
In telescope to have a large magnifying
power, focal length of objective lens is kept large. To increase the magnifying power and resolving power, aperture of the objective lens is made large.