| Assertion (A): A convex lens of focal length 30 cm can't be used as a simple microscope in normal setting. |
| Reason (R): For normal setting, the angular magnification of simple microscope is \[\operatorname{M}=\frac{\operatorname{D}}{f}\] |
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: B
Solution :
| Option [b] is correct. |
| Explanation: For normal adjustment, a 30 cm lens final image cannot form image at the near point (25 cm from the eye). So the statement is true. |
| For image at infinity, angular magnification of simple microscope is given by M = D/f. |
| So, the reason is also true. But reason does not explain the assertion. |
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