v = f lambda
in vac ... 3X10^8 = 600x10^-9xf
in glass speed slower, poss 2/3 that of vacuum
Answer:
in rocket flight become balance and unbalanced sometimes
Time taken by the water balloon to reach the bottom will be given as

here we know that


now by the above formula



now in the same time interval we can say the distance moved by it will be


so it will fall at a distance 15.7 m from its initial position