Question

21. 21. The refractive index of a medium 'X'
with respect to medium ý'is 2/3 and the
refractive index of medium ý'with respect to
z' is 4/3. The refractive index of medium z
with respect to medium x is
8/9
3/2
9/8
2/3​

Answer 1

Answer:

lokinbh  ybbh ghybuh yinj binm umomo

Explanation: