Question

plz answer ............​

Answer 1

C) A is dimensionless ; B has dimensions M0L²T0, is the correct option.

This can be explained as:-

We know, that refractive index is a dimension less quantity.

Now, According to principal of homogeneity we know, that dimensions of quantities on the left is equal to dimensions of quantities in the right. So, A is dimensionless as refractive index.

Also, we know only like physical quantities can be added or subtracted. So, Dimensions of A = Dimensions of B/lamda².

Now since A is dimensionless,

B/lamda² = M0L0T0

B/L² = M0L0T0

so,

B = M0L²T0

Cheers!