The wavelength of light in two liquids `x` and `y` is 3500 Å and 7000 Å, then the critical angle of x relative to y will be

Options

A. `60^(@)`
B. `45^(@)`
C. `30^(@)`
D. `15^(@)`

Explanation

Critical angle,
`sinC=(n_(2))/(n_(1))=(lambda_(1))/(lambda_(2))impliessinC=(3500)/(7000)=(1)/(2)`
`therefore C = 30^(@)`