Find the power of a concave lens of focal length 2m.Directions Qs. 18 - 20: Each of the following questions contains an assertion followed by reason. Read them carefully & answer the question on the basis of following options you have to select the one that best describes the two statements.
(a) If both Assertion and Reason are correct & Reason is the correct explanation of Assertion.
(b) If both Assertion and Reason are correct, but Reason is not the correct explanation of Assertion.
(c) If Assertion is correct but Reason is incorrect.
(d) If Assertion is incorrect but Reason is correct.Assertion: As the temperature of a medium increases, the refractive index decreases.Reason: When a ray travels from vacuum to a medium, then μ is known as absolute refractive index of themedium. (μvacuum= 1).Assertion: Acitic acid is a weak acid.
Reason: Acitic acid gets partially ionised in aqueous solution.
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Explanation:
this que is really apreciable
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