Question

use the snell 's law to show that (1)angle i is greater than angle r

Answer 1

according to snell's laws
sini invers proprtional to medium(n)

sini=1/n1

for two medium
n1*sini=n2*sunr

n1 is air so n1=1

sini/sinr=n2

where n2>1

so
sini/sinr>1

sini>sinr


i>>>>1 angle

r>>>> 2 angle