| Assertion (A): Convex lens behaves like a simple microscope. |
| Reason (R): For larger magnifying power, the focal length of convex lens should be small. |
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: A
Solution :
| Option [a] is correct. |
| Explanation: Convex lens behaves like a simple microscope. The assertion is true. |
| The magnifying power of a convex lens is expressed as: |
| For least distance of distinct vision, \[m=1+\frac{\operatorname{D}}{f}\] |
| For relaxed eye, m = D/f |
| Since is in the denominator, for larger magnifying power, focal length should be small. So, the reason is also correct and it is the assertion. |
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