a)Refraction occurs because of the __________ of light is different in different mediums.
b) When light travels from a rarer medium to denser medium it moves ___________ the normal.
a)Refraction occurs because the speed of light is different in different mediums.
b) When light travels from a rarer medium to denser medium it moves towards the normal.
b) When light travels from a rarer medium to denser medium it moves towards the normal.