Ahorizontal parallel-sided plate of glass having a refractive index of 1.56 is in contact with the surface tnk. a ray coming from above in air makes an angle of incidence of 32.5. with the normal to the top surface of the glass. take refractive index of air 1 a) what is the angle of refraction on glass surface? (5 pts) of wa er i b) what is the critical angle of gla ss-water surface as explained above?

(I). The angle of refraction on glass surface is 20.12°

(II). The critical angle of glass-water surface is  61.0°.

Explanation:

Given that,

Refractive index of glass = 1.56

Angle = 32.5

(I). We need to calculate the angle of refraction on glass surface

Using Snell's law

Put the value into the formula

(II). We need to calculate the critical angle of glass-water surface

Using formula of critical angle

Hence, (I). The angle of refraction on glass surface is 20.12°

(II). The critical angle of glass-water surface is  61.0°.

a and c

c is 100% but i am confused in a