An indice material A and B has a ratio =1.54. Speed for A = 1.45x10^8 m/s. What is the speed for B?

The refractive indices of materials A and B have a ratio of nA/nB = 1.71. The speed of light in material A is 1.36 x 108 m/s. What is the speed of light in material B?

The speed of light is 1.75 times larger in material A than it is inmaterial B. Determine the ratio nA/nB of the refractive indices ofthese materials.

FIND THE RATIO OF SPEED OF SOUND IN HYDROGEN TO THE SPEED OF SOUNDIN OXYGEN AT 1270 K.

PLEASE EXPLAIN EVERY STEP VERY CLEARLY.