Question

assertion:kKerosene having higher refractive index is optically denser than water,

although its mass density is less than that of water.

reason:The speed of light decides whether a medium is optically rarer or optically denser. An optically denser medium may not possess greater mass density .​

Answer 1

Answer:

both a is correct and r is also correct and A is the correct explanation of R

Answer 2

here is your answer

Explanation:

both assertion and reason are correct and reason is correct explaination of assertion