MCQ
Assertion: Two convex lenses joined together cannot produce an achromatic combination.
Reason : The condition for achromatism is $\frac{{{\omega _1}}}{{{f_1}}} + \frac{{{\omega _2}}}{{{f_2}}} = 0$ where symbols have their usual meaning.
- ✓If both Assertion and Reason are correct and the Reason is a correct explanation of the Assertion.
- BIf both Assertion and Reason are correct but Reason is not a correct explanation of the Assertion.
- CIf the Assertion is correct but Reason is incorrect.
- DIf both the Assertion and Reason are incorrect.