Will Power vs Determination | Doubtnut Morning Motivation | Divyashish Sir

A child has correction spectacles of power -3 D. Determine the vision defect and also find the far point of the child without spectacles.

A convex lens of focal length 25 cm is placed co-axially in contact with a concave lens of focal length 20 cm . Determine the power of the combination. Will the system be converging or diverging in nature ?

A convex lens of focal length 30 cm is placed coaxially in contact with a concave lens of focal length 40 cm. Determine the power of the combination. Will the system be converging or diverging in nature?

Assertion (A) : The order of a reaction may be defined as the sum of the powers to which the concentration terms are raised in order to determine the rate of reaction gives the total order of reactions. Reason (R) : The number of molecules whose concentrations determine the ratio of reaction at a given temperature is called order to the reaction.