Question

Pls answer qno31 quickly

Answer 1

Answer:

ug= 1/sin i

Explanation:

Snell's law at glass water interface

ug*sin i1 = uw* sin r.....1

Snell's law at water air interface

uw* sin i2 = sin 90. ( as i2= r by alternate interior angle and ua =1)

(4/3)sin r = 1

sin r= 3/4......2

substituting 2 in 1

ug sin i = (4/3)(3/4)

ug= 1/sin i

hope it helps u

mark as brainliest