| Assertion (A): If the objective lens and the eyepiece lens of a microscope are interchanged, it works as a telescope. |
| Reason (R): Objective lens of telescope require large focal length and eyepiece lens require small focal length. |
A) Both A and R are true and R is the correct explanation of A
B) Both A and R are true but R is NOT the correct explanation of A
C) A is true but R is false
D) A is false and R is True
Correct Answer: D
Solution :
| Option [d] is correct. |
| Explanation: Magnification of microscope is inversely proportional to focal lengths of objective lens and the eyepiece lens. Hence both the focal lengths are small. |
| On the other hand, magnification of microscope is inversely proportional to focal lengths of eyepiece lens and directly proportional to the objective lens. So, focal length of objective lens is large and focal length of eyepiece lens is small. |
| Hence, if the objective lens and the eyepiece lens of a microscope are interchanged that will not meet the criterion of the telescope. |
| So, the reason is true. But the assertion is false. |
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