Figures (a) and (b) show refraction of a ray in air incident at
60∘ with the normal to a glass-air and water-air interface, respectively. Predict the angle of refraction in glass when the angle of incidence in water is
45∘ with the normal to a water-glass interface [Figure (c)].
![](https://df0b18phdhzpx.cloudfront.net/ckeditor_assets/pictures/1530115/original_4.png)